765726131 has 4 divisors (see below), whose sum is σ = 778704600. Its totient is φ = 752747664.

The previous prime is 765726113. The next prime is 765726173. The reversal of 765726131 is 131627567.

765726131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 765726131 - 2¹⁸ = 765463987 is a prime.

It is a super-2 number, since 2×765726131² = 1172673015392458322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (765726191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6489146 + ... + 6489263.

It is an arithmetic number, because the mean of its divisors is an integer number (194676150).

Almost surely, 2^765726131 is an apocalyptic number.

765726131 is a deficient number, since it is larger than the sum of its proper divisors (12978469).

765726131 is a wasteful number, since it uses less digits than its factorization.

765726131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12978468.

The product of its digits is 52920, while the sum is 38.

The square root of 765726131 is about 27671.7569192850. The cubic root of 765726131 is about 914.8667053782.

The spelling of 765726131 in words is "seven hundred sixty-five million, seven hundred twenty-six thousand, one hundred thirty-one".