139965812431 has 2 divisors, whose sum is σ = 139965812432. Its totient is φ = 139965812430.

The previous prime is 139965812381. The next prime is 139965812477. The reversal of 139965812431 is 134218569931.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 139965812431 - 2⁹ = 139965811919 is a prime.

It is a super-2 number, since 2×139965812431² (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 (109965812431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69982906215 + 69982906216.

It is an arithmetic number, because the mean of its divisors is an integer number (69982906216).

Almost surely, 2^139965812431 is an apocalyptic number.

139965812431 is a deficient number, since it is larger than the sum of its proper divisors (1).

139965812431 is an equidigital number, since it uses as much as digits as its factorization.

139965812431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1399680, while the sum is 52.

The spelling of 139965812431 in words is "one hundred thirty-nine billion, nine hundred sixty-five million, eight hundred twelve thousand, four hundred thirty-one".