138360435931 has 2 divisors, whose sum is σ = 138360435932. Its totient is φ = 138360435930.

The previous prime is 138360435923. The next prime is 138360435989. The reversal of 138360435931 is 139534063831.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 138360435931 - 2³ = 138360435923 is a prime.

It is a super-2 number, since 2×138360435931² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (138360435131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69180217965 + 69180217966.

It is an arithmetic number, because the mean of its divisors is an integer number (69180217966).

Almost surely, 2^138360435931 is an apocalyptic number.

138360435931 is a deficient number, since it is larger than the sum of its proper divisors (1).

138360435931 is an equidigital number, since it uses as much as digits as its factorization.

138360435931 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 699840, while the sum is 46.

The spelling of 138360435931 in words is "one hundred thirty-eight billion, three hundred sixty million, four hundred thirty-five thousand, nine hundred thirty-one".