137955931 has 4 divisors (see below), whose sum is σ = 138121200. Its totient is φ = 137790664.

The previous prime is 137955907. The next prime is 137955947. The reversal of 137955931 is 139559731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 139559731 = 19 ⋅7345249.

It is a cyclic number.

It is not a de Polignac number, because 137955931 - 2⁷ = 137955803 is a prime.

It is a super-2 number, since 2×137955931² = 38063677796153522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (137955431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81376 + ... + 83053.

It is an arithmetic number, because the mean of its divisors is an integer number (34530300).

Almost surely, 2^137955931 is an apocalyptic number.

137955931 is a deficient number, since it is larger than the sum of its proper divisors (165269).

137955931 is an equidigital number, since it uses as much as digits as its factorization.

137955931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165268.

The product of its digits is 127575, while the sum is 43.

The square root of 137955931 is about 11745.4642734972. The cubic root of 137955931 is about 516.7099113763.

The spelling of 137955931 in words is "one hundred thirty-seven million, nine hundred fifty-five thousand, nine hundred thirty-one".