779775979 has 8 divisors (see below), whose sum is σ = 824256000. Its totient is φ = 735639912.

The previous prime is 779775977. The next prime is 779775991. The reversal of 779775979 is 979577977.

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

It is a cyclic number.

It is not a de Polignac number, because 779775979 - 2¹ = 779775977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (779775973) 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, 81319 + ... + 90400.

It is an arithmetic number, because the mean of its divisors is an integer number (103032000).

Almost surely, 2^779775979 is an apocalyptic number.

779775979 is a deficient number, since it is larger than the sum of its proper divisors (44480021).

779775979 is a wasteful number, since it uses less digits than its factorization.

779775979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171977.

The product of its digits is 61261515, while the sum is 67.

The square root of 779775979 is about 27924.4691802727. The cubic root of 779775979 is about 920.4282737424.

The spelling of 779775979 in words is "seven hundred seventy-nine million, seven hundred seventy-five thousand, nine hundred seventy-nine".