679556845 has 8 divisors (see below), whose sum is σ = 889601760. Its totient is φ = 494223120.

The previous prime is 679556803. The next prime is 679556887. The reversal of 679556845 is 548655976.

It is an interprime number because it is at equal distance from previous prime (679556803) and next prime (679556887).

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

It is a de Polignac number, because none of the positive numbers 2^k-679556845 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (55), and also a Moran number because the ratio is a prime number: 12355579 = 679556845 / (6 + 7 + 9 + 5 + 5 + 6 + 8 + 4 + 5).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6177735 + ... + 6177844.

It is an arithmetic number, because the mean of its divisors is an integer number (111200220).

Almost surely, 2^679556845 is an apocalyptic number.

It is an amenable number.

679556845 is a deficient number, since it is larger than the sum of its proper divisors (210044915).

679556845 is a wasteful number, since it uses less digits than its factorization.

679556845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12355595.

The product of its digits is 9072000, while the sum is 55.

The square root of 679556845 is about 26068.3111267301. The cubic root of 679556845 is about 879.1748657571.

The spelling of 679556845 in words is "six hundred seventy-nine million, five hundred fifty-six thousand, eight hundred forty-five".