779679399 has 4 divisors (see below), whose sum is σ = 1039572536. Its totient is φ = 519786264.

The previous prime is 779679377. The next prime is 779679457. The reversal of 779679399 is 993976977.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 779679399 - 2¹¹ = 779677351 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 (779679319) 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 3 ways as a sum of consecutive naturals, for example, 129946564 + ... + 129946569.

It is an arithmetic number, because the mean of its divisors is an integer number (259893134).

Almost surely, 2^779679399 is an apocalyptic number.

779679399 is a deficient number, since it is larger than the sum of its proper divisors (259893137).

779679399 is a wasteful number, since it uses less digits than its factorization.

779679399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259893136.

The product of its digits is 40507614, while the sum is 66.

The square root of 779679399 is about 27922.7398190077. The cubic root of 779679399 is about 920.3902719592.

The spelling of 779679399 in words is "seven hundred seventy-nine million, six hundred seventy-nine thousand, three hundred ninety-nine".