137939979 has 12 divisors (see below), whose sum is σ = 190484216. Its totient is φ = 88787328.

The previous prime is 137939953. The next prime is 137940017. The reversal of 137939979 is 979939731.

It is not a de Polignac number, because 137939979 - 2⁹ = 137939467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (137939909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24814 + ... + 29859.

Almost surely, 2^137939979 is an apocalyptic number.

137939979 is a deficient number, since it is larger than the sum of its proper divisors (52544237).

137939979 is an equidigital number, since it uses as much as digits as its factorization.

137939979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54734 (or 54705 counting only the distinct ones).

The product of its digits is 2893401, while the sum is 57.

The square root of 137939979 is about 11744.7851832207. The cubic root of 137939979 is about 516.6899946919.

The spelling of 137939979 in words is "one hundred thirty-seven million, nine hundred thirty-nine thousand, nine hundred seventy-nine".