109256139 has 12 divisors (see below), whose sum is σ = 158110056. Its totient is φ = 72700992.

The previous prime is 109256113. The next prime is 109256159. The reversal of 109256139 is 931652901.

109256139 is a `hidden beast` number, since 1 + 0 + 92 + 561 + 3 + 9 = 666.

It is not a de Polignac number, because 109256139 - 2¹² = 109252043 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (109256159) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6174 + ... + 16019.

It is an arithmetic number, because the mean of its divisors is an integer number (13175838).

Almost surely, 2^109256139 is an apocalyptic number.

109256139 is a deficient number, since it is larger than the sum of its proper divisors (48853917).

109256139 is a wasteful number, since it uses less digits than its factorization.

109256139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22746 (or 22743 counting only the distinct ones).

The product of its (nonzero) digits is 14580, while the sum is 36.

The square root of 109256139 is about 10452.5661442538. The cubic root of 109256139 is about 478.0594963961.

The spelling of 109256139 in words is "one hundred nine million, two hundred fifty-six thousand, one hundred thirty-nine".