137879618 has 30 divisors (see below), whose sum is σ = 228213699. Its totient is φ = 62471772.

The previous prime is 137879593. The next prime is 137879627. The reversal of 137879618 is 816978731.

It can be written as a sum of positive squares in only one way, i.e., 68939809 + 68939809 = 8303^2 + 8303^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=8303.

It is a Duffinian number.

It is an unprimeable number.

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 14 ways as a sum of consecutive naturals, for example, 5994755 + ... + 5994777.

Almost surely, 2^137879618 is an apocalyptic number.

137879618 is a deficient number, since it is larger than the sum of its proper divisors (90334081).

137879618 is an frugal number, since it uses more digits than its factorization.

137879618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124 (or 44 counting only the distinct ones).

The product of its digits is 508032, while the sum is 50.

The square root of 137879618 is about 11742.2152083838. The cubic root of 137879618 is about 516.6146177652.

Multiplying 137879618 by its sum of digits (50), we get a square (6893980900 = 83030²).

Multiplying 137879618 by its product of digits (508032), we get a square (70047258091776 = 8369424²).

The spelling of 137879618 in words is "one hundred thirty-seven million, eight hundred seventy-nine thousand, six hundred eighteen".