139137516631 has 2 divisors, whose sum is σ = 139137516632. Its totient is φ = 139137516630.

The previous prime is 139137516613. The next prime is 139137516649. The reversal of 139137516631 is 136615731931.

Together with previous prime (139137516613) it forms an Ormiston pair, because they use the same digits, order apart.

It is a balanced prime because it is at equal distance from previous prime (139137516613) and next prime (139137516649).

It is a cyclic number.

It is not a de Polignac number, because 139137516631 - 2¹³ = 139137508439 is a prime.

It is a super-2 number, since 2×139137516631² (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 (139137516601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69568758315 + 69568758316.

It is an arithmetic number, because the mean of its divisors is an integer number (69568758316).

Almost surely, 2^139137516631 is an apocalyptic number.

139137516631 is a deficient number, since it is larger than the sum of its proper divisors (1).

139137516631 is an equidigital number, since it uses as much as digits as its factorization.

139137516631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 306180, while the sum is 46.

The spelling of 139137516631 in words is "one hundred thirty-nine billion, one hundred thirty-seven million, five hundred sixteen thousand, six hundred thirty-one".