155679939 has 36 divisors (see below), whose sum is σ = 247589160. Its totient is φ = 93994560.

The previous prime is 155679929. The next prime is 155679941. The reversal of 155679939 is 939976551.

It is not a de Polignac number, because 155679939 - 2⁵ = 155679907 is a prime.

It is not an unprimeable number, because it can be changed into a prime (155679919) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 89599 + ... + 91319.

Almost surely, 2^155679939 is an apocalyptic number.

155679939 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

155679939 is a deficient number, since it is larger than the sum of its proper divisors (91909221).

155679939 is a wasteful number, since it uses less digits than its factorization.

155679939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1792 (or 1766 counting only the distinct ones).

The product of its digits is 2296350, while the sum is 54.

The square root of 155679939 is about 12477.1767239228. The cubic root of 155679939 is about 537.9528560653.

The spelling of 155679939 in words is "one hundred fifty-five million, six hundred seventy-nine thousand, nine hundred thirty-nine".