768880813 has 4 divisors (see below), whose sum is σ = 768990240. Its totient is φ = 768771388.

The previous prime is 768880787. The next prime is 768880829. The reversal of 768880813 is 318088867.

768880813 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-768880813 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (768880873) 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, 43393 + ... + 58486.

It is an arithmetic number, because the mean of its divisors is an integer number (192247560).

Almost surely, 2^768880813 is an apocalyptic number.

It is an amenable number.

768880813 is a deficient number, since it is larger than the sum of its proper divisors (109427).

768880813 is a wasteful number, since it uses less digits than its factorization.

768880813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109426.

The product of its (nonzero) digits is 516096, while the sum is 49.

The square root of 768880813 is about 27728.7001678766. The cubic root of 768880813 is about 916.1213572264.

The spelling of 768880813 in words is "seven hundred sixty-eight million, eight hundred eighty thousand, eight hundred thirteen".