137731786631 has 2 divisors, whose sum is σ = 137731786632. Its totient is φ = 137731786630.

The previous prime is 137731786589. The next prime is 137731786679. The reversal of 137731786631 is 136687137731.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 137731786631 - 2¹⁴ = 137731770247 is a prime.

It is a super-2 number, since 2×137731786631² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (137731786531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68865893315 + 68865893316.

It is an arithmetic number, because the mean of its divisors is an integer number (68865893316).

Almost surely, 2^137731786631 is an apocalyptic number.

137731786631 is a deficient number, since it is larger than the sum of its proper divisors (1).

137731786631 is an equidigital number, since it uses as much as digits as its factorization.

137731786631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2667168, while the sum is 53.

The spelling of 137731786631 in words is "one hundred thirty-seven billion, seven hundred thirty-one million, seven hundred eighty-six thousand, six hundred thirty-one".