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107909 = 29612
BaseRepresentation
bin11010010110000101
312111000122
4122112011
511423114
62151325
7626414
oct322605
9174018
10107909
117408a
1252545
133a169
142b47b
1521e8e
hex1a585

107909 has 6 divisors (see below), whose sum is σ = 113490. Its totient is φ = 102480.

The previous prime is 107903. The next prime is 107923. The reversal of 107909 is 909701.

It can be written as a sum of positive squares in 3 ways, for example, as 4225 + 103684 = 65^2 + 322^2 .

It is not a de Polignac number, because 107909 - 212 = 103813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (107903) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1739 + ... + 1799.

It is an arithmetic number, because the mean of its divisors is an integer number (18915).

2107909 is an apocalyptic number.

It is an amenable number.

107909 is a deficient number, since it is larger than the sum of its proper divisors (5581).

107909 is an frugal number, since it uses more digits than its factorization.

107909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151 (or 90 counting only the distinct ones).

The product of its (nonzero) digits is 567, while the sum is 26.

The square root of 107909 is about 328.4950532352. The cubic root of 107909 is about 47.6086524770.

The spelling of 107909 in words is "one hundred seven thousand, nine hundred nine".

Divisors: 1 29 61 1769 3721 107909