2639139967 has 2 divisors, whose sum is σ = 2639139968. Its totient is φ = 2639139966.

The previous prime is 2639139953. The next prime is 2639140043. The reversal of 2639139967 is 7699319362.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2639139967 is a prime.

It is a super-2 number, since 2×2639139967² = 13930119530833522178, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2639139907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1319569983 + 1319569984.

It is an arithmetic number, because the mean of its divisors is an integer number (1319569984).

Almost surely, 2^2639139967 is an apocalyptic number.

2639139967 is a deficient number, since it is larger than the sum of its proper divisors (1).

2639139967 is an equidigital number, since it uses as much as digits as its factorization.

2639139967 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3306744, while the sum is 55.

The square root of 2639139967 is about 51372.5604481614. The cubic root of 2639139967 is about 1381.9345490954.

The spelling of 2639139967 in words is "two billion, six hundred thirty-nine million, one hundred thirty-nine thousand, nine hundred sixty-seven".