639272357131 has 2 divisors, whose sum is σ = 639272357132. Its totient is φ = 639272357130.

The previous prime is 639272357093. The next prime is 639272357149. The reversal of 639272357131 is 131753272936.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-639272357131 is a prime.

It is a super-2 number, since 2×639272357131² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (639272351131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 319636178565 + 319636178566.

It is an arithmetic number, because the mean of its divisors is an integer number (319636178566).

Almost surely, 2^639272357131 is an apocalyptic number.

639272357131 is a deficient number, since it is larger than the sum of its proper divisors (1).

639272357131 is an equidigital number, since it uses as much as digits as its factorization.

639272357131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1428840, while the sum is 49.

The spelling of 639272357131 in words is "six hundred thirty-nine billion, two hundred seventy-two million, three hundred fifty-seven thousand, one hundred thirty-one".