137387208979 has 4 divisors (see below), whose sum is σ = 137388016584. Its totient is φ = 137386401376.

The previous prime is 137387208971. The next prime is 137387208983. The reversal of 137387208979 is 979802783731.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 979802783731 = 5827 ⋅168148753.

It is a cyclic number.

It is not a de Polignac number, because 137387208979 - 2³ = 137387208971 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 137387208979.

It is not an unprimeable number, because it can be changed into a prime (137387208971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38422 + ... + 525595.

It is an arithmetic number, because the mean of its divisors is an integer number (34347004146).

Almost surely, 2^137387208979 is an apocalyptic number.

137387208979 is a deficient number, since it is larger than the sum of its proper divisors (807605).

137387208979 is an equidigital number, since it uses as much as digits as its factorization.

137387208979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 807604.

The product of its (nonzero) digits is 32006016, while the sum is 64.

The spelling of 137387208979 in words is "one hundred thirty-seven billion, three hundred eighty-seven million, two hundred eight thousand, nine hundred seventy-nine".