39895668139 has 2 divisors, whose sum is σ = 39895668140. Its totient is φ = 39895668138.

The previous prime is 39895668107. The next prime is 39895668179. The reversal of 39895668139 is 93186659893.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 39895668139 - 2⁵ = 39895668107 is a prime.

It is not a weakly prime, because it can be changed into another prime (39895668179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19947834069 + 19947834070.

It is an arithmetic number, because the mean of its divisors is an integer number (19947834070).

Almost surely, 2^39895668139 is an apocalyptic number.

39895668139 is a deficient number, since it is larger than the sum of its proper divisors (1).

39895668139 is an equidigital number, since it uses as much as digits as its factorization.

39895668139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 75582720, while the sum is 67.

The spelling of 39895668139 in words is "thirty-nine billion, eight hundred ninety-five million, six hundred sixty-eight thousand, one hundred thirty-nine".