64970232139 has 2 divisors, whose sum is σ = 64970232140. Its totient is φ = 64970232138.

The previous prime is 64970232049. The next prime is 64970232181. The reversal of 64970232139 is 93123207946.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64970232139 - 2⁷ = 64970232011 is a prime.

It is a super-2 number, since 2×64970232139² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (64970232539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32485116069 + 32485116070.

It is an arithmetic number, because the mean of its divisors is an integer number (32485116070).

Almost surely, 2^64970232139 is an apocalyptic number.

64970232139 is a deficient number, since it is larger than the sum of its proper divisors (1).

64970232139 is an equidigital number, since it uses as much as digits as its factorization.

64970232139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 489888, while the sum is 46.

The spelling of 64970232139 in words is "sixty-four billion, nine hundred seventy million, two hundred thirty-two thousand, one hundred thirty-nine".