779470561 has 3 divisors (see below), whose sum is σ = 779498481. Its totient is φ = 779442642.

The previous prime is 779470543. The next prime is 779470577. The reversal of 779470561 is 165074977.

The square root of 779470561 is 27919.

It is a perfect power (a square), and thus also a powerful number.

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 not a de Polignac number, because 779470561 - 2¹⁵ = 779437793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (779470061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 13960 + ... + 41878.

It is an arithmetic number, because the mean of its divisors is an integer number (259832827).

Almost surely, 2^779470561 is an apocalyptic number.

779470561 is the 27919-th square number.

779470561 is the 13960-th centered octagonal number.

It is an amenable number.

779470561 is a deficient number, since it is larger than the sum of its proper divisors (27920).

779470561 is an frugal number, since it uses more digits than its factorization.

779470561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55838 (or 27919 counting only the distinct ones).

The product of its (nonzero) digits is 370440, while the sum is 46.

The cubic root of 779470561 is about 920.3080887662.

The spelling of 779470561 in words is "seven hundred seventy-nine million, four hundred seventy thousand, five hundred sixty-one".