768690981 has 12 divisors (see below), whose sum is σ = 1158607008. Its totient is φ = 490179624.

The previous prime is 768690931. The next prime is 768690983. The reversal of 768690981 is 189096867.

768690981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 768690981 - 2⁶ = 768690917 is a prime.

It is a super-2 number, since 2×768690981² = 1181771648541484722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (768690983) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1856535 + ... + 1856948.

It is an arithmetic number, because the mean of its divisors is an integer number (96550584).

Almost surely, 2^768690981 is an apocalyptic number.

It is an amenable number.

768690981 is a deficient number, since it is larger than the sum of its proper divisors (389916027).

768690981 is a wasteful number, since it uses less digits than its factorization.

768690981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3713512 (or 3713509 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 54.

The square root of 768690981 is about 27725.2769327919. The cubic root of 768690981 is about 916.0459560888.

The spelling of 768690981 in words is "seven hundred sixty-eight million, six hundred ninety thousand, nine hundred eighty-one".