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109000 = 2353109
BaseRepresentation
bin11010100111001000
312112112001
4122213020
511442000
62200344
7632533
oct324710
9175461
10109000
1174991
12530b4
133a7c8
142ba1a
152246a
hex1a9c8

109000 has 32 divisors (see below), whose sum is σ = 257400. Its totient is φ = 43200.

The previous prime is 108991. The next prime is 109001. The reversal of 109000 is 901.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 42436 + 66564 = 206^2 + 258^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (109001) by changing a digit.

109000 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 946 + ... + 1054.

2109000 is an apocalyptic number.

109000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 109000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (128700).

109000 is an abundant number, since it is smaller than the sum of its proper divisors (148400).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

109000 is a wasteful number, since it uses less digits than its factorization.

109000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130 (or 116 counting only the distinct ones).

The product of its (nonzero) digits is 9, while the sum is 10.

The square root of 109000 is about 330.1514803844. The cubic root of 109000 is about 47.7685618104.

Adding to 109000 its reverse (901), we get a palindrome (109901).

It can be divided in two parts, 10 and 9000, that multiplied together give a square (90000 = 3002).

The spelling of 109000 in words is "one hundred nine thousand".

Divisors: 1 2 4 5 8 10 20 25 40 50 100 109 125 200 218 250 436 500 545 872 1000 1090 2180 2725 4360 5450 10900 13625 21800 27250 54500 109000