764772131 has 2 divisors, whose sum is σ = 764772132. Its totient is φ = 764772130.

The previous prime is 764772091. The next prime is 764772179. The reversal of 764772131 is 131277467.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 764772131 - 2¹⁸ = 764509987 is a prime.

It is a super-2 number, since 2×764772131² = 1169752824708562322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (764772191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 382386065 + 382386066.

It is an arithmetic number, because the mean of its divisors is an integer number (382386066).

Almost surely, 2^764772131 is an apocalyptic number.

764772131 is a deficient number, since it is larger than the sum of its proper divisors (1).

764772131 is an equidigital number, since it uses as much as digits as its factorization.

764772131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 49392, while the sum is 38.

The square root of 764772131 is about 27654.5137545392. The cubic root of 764772131 is about 914.4866105843.

The spelling of 764772131 in words is "seven hundred sixty-four million, seven hundred seventy-two thousand, one hundred thirty-one".