779000991 has 8 divisors (see below), whose sum is σ = 1038952320. Its totient is φ = 519191832.

The previous prime is 779000941. The next prime is 779000993. The reversal of 779000991 is 199000977.

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

It is not a de Polignac number, because 779000991 - 2¹⁰ = 778999967 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (779000993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22021 + ... + 45198.

It is an arithmetic number, because the mean of its divisors is an integer number (129869040).

Almost surely, 2^779000991 is an apocalyptic number.

779000991 is a deficient number, since it is larger than the sum of its proper divisors (259951329).

779000991 is a wasteful number, since it uses less digits than its factorization.

779000991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71085.

The product of its (nonzero) digits is 35721, while the sum is 42.

The square root of 779000991 is about 27910.5892270299. The cubic root of 779000991 is about 920.1232471149.

The spelling of 779000991 in words is "seven hundred seventy-nine million, nine hundred ninety-one", and thus it is an aban number.