137431718 has 16 divisors (see below), whose sum is σ = 211714560. Its totient is φ = 66885000.

The previous prime is 137431699. The next prime is 137431729. The reversal of 137431718 is 817134731.

It is a super-2 number, since 2×137431718² = 37774954224863048, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5093 + ... + 17343.

It is an arithmetic number, because the mean of its divisors is an integer number (13232160).

Almost surely, 2^137431718 is an apocalyptic number.

137431718 is a deficient number, since it is larger than the sum of its proper divisors (74282842).

137431718 is a wasteful number, since it uses less digits than its factorization.

137431718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12403.

The product of its digits is 14112, while the sum is 35.

The square root of 137431718 is about 11723.1274837391. The cubic root of 137431718 is about 516.0546058230.

The spelling of 137431718 in words is "one hundred thirty-seven million, four hundred thirty-one thousand, seven hundred eighteen".