137887857 has 12 divisors (see below), whose sum is σ = 199324944. Its totient is φ = 91854360.

The previous prime is 137887853. The next prime is 137887891. The reversal of 137887857 is 758788731.

It is not a de Polignac number, because 137887857 - 2² = 137887853 is a prime.

It is a super-2 number, since 2×137887857² = 38026122216104898, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (137887853) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8182 + ... + 18512.

It is an arithmetic number, because the mean of its divisors is an integer number (16610412).

Almost surely, 2^137887857 is an apocalyptic number.

It is an amenable number.

137887857 is a deficient number, since it is larger than the sum of its proper divisors (61437087).

137887857 is a wasteful number, since it uses less digits than its factorization.

137887857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11820 (or 11817 counting only the distinct ones).

The product of its digits is 2634240, while the sum is 54.

The square root of 137887857 is about 11742.5660313238. The cubic root of 137887857 is about 516.6249076667.

The spelling of 137887857 in words is "one hundred thirty-seven million, eight hundred eighty-seven thousand, eight hundred fifty-seven".