137637685 has 4 divisors (see below), whose sum is σ = 165165228. Its totient is φ = 110110144.

The previous prime is 137637677. The next prime is 137637719. The reversal of 137637685 is 586736731.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 61999876 + 75637809 = 7874^2 + 8697^2 .

It is a cyclic number.

It is not a de Polignac number, because 137637685 - 2³ = 137637677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 13763764 + ... + 13763773.

It is an arithmetic number, because the mean of its divisors is an integer number (41291307).

Almost surely, 2^137637685 is an apocalyptic number.

It is an amenable number.

137637685 is a deficient number, since it is larger than the sum of its proper divisors (27527543).

137637685 is an equidigital number, since it uses as much as digits as its factorization.

137637685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27527542.

The product of its digits is 635040, while the sum is 46.

The square root of 137637685 is about 11731.9088387184. The cubic root of 137637685 is about 516.3122784237.

The spelling of 137637685 in words is "one hundred thirty-seven million, six hundred thirty-seven thousand, six hundred eighty-five".