139791562531 has 2 divisors, whose sum is σ = 139791562532. Its totient is φ = 139791562530.

The previous prime is 139791562489. The next prime is 139791562579. The reversal of 139791562531 is 135265197931.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 139791562531 - 2¹¹ = 139791560483 is a prime.

It is a super-2 number, since 2×139791562531² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (139791562831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69895781265 + 69895781266.

It is an arithmetic number, because the mean of its divisors is an integer number (69895781266).

Almost surely, 2^139791562531 is an apocalyptic number.

139791562531 is a deficient number, since it is larger than the sum of its proper divisors (1).

139791562531 is an equidigital number, since it uses as much as digits as its factorization.

139791562531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1530900, while the sum is 52.

The spelling of 139791562531 in words is "one hundred thirty-nine billion, seven hundred ninety-one million, five hundred sixty-two thousand, five hundred thirty-one".