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109375 = 567
BaseRepresentation
bin11010101100111111
312120000221
4122230333
512000000
62202211
7633610
oct325477
9176027
10109375
11751a2
1253367
133aa26
142bc07
152261a
hex1ab3f

109375 has 14 divisors (see below), whose sum is σ = 156248. Its totient is φ = 75000.

The previous prime is 109367. The next prime is 109379. The reversal of 109375 is 573901.

It can be divided in two parts, 109 and 375, that added together give a palindrome (484).

It is a trimorphic number since its cube, 1308441162109375, ends in 109375.

It is not a de Polignac number, because 109375 - 23 = 109367 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

109375 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109379) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 15622 + ... + 15628.

109375 is a Friedman number, since it can be written as 7*5^(9-3*(1+0)), using all its digits and the basic arithmetic operations.

2109375 is an apocalyptic number.

109375 is a deficient number, since it is larger than the sum of its proper divisors (46873).

109375 is an frugal number, since it uses more digits than its factorization.

109375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37 (or 12 counting only the distinct ones).

The product of its (nonzero) digits is 945, while the sum is 25.

The square root of 109375 is about 330.7189138831. The cubic root of 109375 is about 47.8232795693.

The spelling of 109375 in words is "one hundred nine thousand, three hundred seventy-five".

Divisors: 1 5 7 25 35 125 175 625 875 3125 4375 15625 21875 109375