765876981 has 8 divisors (see below), whose sum is σ = 1021308064. Its totient is φ = 510515280.

The previous prime is 765876973. The next prime is 765877001. The reversal of 765876981 is 189678567.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 765876981 - 2³ = 765876973 is a prime.

It is a super-2 number, since 2×765876981² = 1173135100051348722, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (765876941) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19746 + ... + 43836.

It is an arithmetic number, because the mean of its divisors is an integer number (127663508).

Almost surely, 2^765876981 is an apocalyptic number.

It is an amenable number.

765876981 is a deficient number, since it is larger than the sum of its proper divisors (255431083).

765876981 is a wasteful number, since it uses less digits than its factorization.

765876981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34691.

The product of its digits is 5080320, while the sum is 57.

The square root of 765876981 is about 27674.4824883863. The cubic root of 765876981 is about 914.9267784579.

The spelling of 765876981 in words is "seven hundred sixty-five million, eight hundred seventy-six thousand, nine hundred eighty-one".