137931879 has 8 divisors (see below), whose sum is σ = 185081200. Its totient is φ = 91368576.

The previous prime is 137931877. The next prime is 137931923. The reversal of 137931879 is 978139731.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 137931879 - 2¹ = 137931877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137931877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 145954 + ... + 146895.

It is an arithmetic number, because the mean of its divisors is an integer number (23135150).

Almost surely, 2^137931879 is an apocalyptic number.

137931879 is a deficient number, since it is larger than the sum of its proper divisors (47149321).

137931879 is a wasteful number, since it uses less digits than its factorization.

137931879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293009.

The product of its digits is 285768, while the sum is 48.

The square root of 137931879 is about 11744.4403442650. The cubic root of 137931879 is about 516.6798809431.

The spelling of 137931879 in words is "one hundred thirty-seven million, nine hundred thirty-one thousand, eight hundred seventy-nine".