679694777 has 4 divisors (see below), whose sum is σ = 694156416. Its totient is φ = 665233140.

The previous prime is 679694753. The next prime is 679694783. The reversal of 679694777 is 777496976.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 679694777 - 2²⁰ = 678646201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (679694707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7230749 + ... + 7230842.

It is an arithmetic number, because the mean of its divisors is an integer number (173539104).

Almost surely, 2^679694777 is an apocalyptic number.

It is an amenable number.

679694777 is a deficient number, since it is larger than the sum of its proper divisors (14461639).

679694777 is a wasteful number, since it uses less digits than its factorization.

679694777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14461638.

The product of its digits is 28005264, while the sum is 62.

The square root of 679694777 is about 26070.9565800720. The cubic root of 679694777 is about 879.2343447861.

The spelling of 679694777 in words is "six hundred seventy-nine million, six hundred ninety-four thousand, seven hundred seventy-seven".