765720994 has 16 divisors (see below), whose sum is σ = 1181947896. Its totient is φ = 371779200.

The previous prime is 765720979. The next prime is 765721001. The reversal of 765720994 is 499027567.

It can be written as a sum of positive squares in 4 ways, for example, as 512433769 + 253287225 = 22637^2 + 15915^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28624 + ... + 48484.

Almost surely, 2^765720994 is an apocalyptic number.

765720994 is a gapful number since it is divisible by the number (74) formed by its first and last digit.

765720994 is a deficient number, since it is larger than the sum of its proper divisors (416226902).

765720994 is a wasteful number, since it uses less digits than its factorization.

765720994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20421.

The product of its (nonzero) digits is 952560, while the sum is 49.

The square root of 765720994 is about 27671.6640988575. The cubic root of 765720994 is about 914.8646595289.

The spelling of 765720994 in words is "seven hundred sixty-five million, seven hundred twenty thousand, nine hundred ninety-four".