137696731 has 2 divisors, whose sum is σ = 137696732. Its totient is φ = 137696730.

The previous prime is 137696723. The next prime is 137696747.

137696731 is nontrivially palindromic in base 10.

137696731 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 137696731 - 2³ = 137696723 is a prime.

It is a super-2 number, since 2×137696731² = 37920779456172722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (137696771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68848365 + 68848366.

It is an arithmetic number, because the mean of its divisors is an integer number (68848366).

Almost surely, 2^137696731 is an apocalyptic number.

137696731 is a deficient number, since it is larger than the sum of its proper divisors (1).

137696731 is an equidigital number, since it uses as much as digits as its factorization.

137696731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 142884, while the sum is 43.

The square root of 137696731 is about 11734.4250391743. The cubic root of 137696731 is about 516.3860998154.

The spelling of 137696731 in words is "one hundred thirty-seven million, six hundred ninety-six thousand, seven hundred thirty-one".