779088991 has 4 divisors (see below), whose sum is σ = 779159952. Its totient is φ = 779018032.

The previous prime is 779088953. The next prime is 779089027. The reversal of 779088991 is 199880977.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 779088991 - 2¹⁷ = 778957919 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (779088941) 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, 15115 + ... + 42268.

It is an arithmetic number, because the mean of its divisors is an integer number (194789988).

Almost surely, 2^779088991 is an apocalyptic number.

779088991 is a deficient number, since it is larger than the sum of its proper divisors (70961).

779088991 is a wasteful number, since it uses less digits than its factorization.

779088991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70960.

The product of its (nonzero) digits is 2286144, while the sum is 58.

The square root of 779088991 is about 27912.1656451089. The cubic root of 779088991 is about 920.1578931115.

The spelling of 779088991 in words is "seven hundred seventy-nine million, eighty-eight thousand, nine hundred ninety-one".