679760363521 has 4 divisors (see below), whose sum is σ = 695568744112. Its totient is φ = 663951982932.

The previous prime is 679760363509. The next prime is 679760363533. The reversal of 679760363521 is 125363067976.

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 an interprime number because it is at equal distance from previous prime (679760363509) and next prime (679760363533).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-679760363521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (679760363551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7904190231 + ... + 7904190316.

It is an arithmetic number, because the mean of its divisors is an integer number (173892186028).

It is a Proth number, since it is equal to 324135 ⋅ 2²¹ + 1 and 324135 < 2²¹.

Almost surely, 2^679760363521 is an apocalyptic number.

It is an amenable number.

679760363521 is a deficient number, since it is larger than the sum of its proper divisors (15808380591).

679760363521 is a wasteful number, since it uses less digits than its factorization.

679760363521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15808380590.

The product of its (nonzero) digits is 8573040, while the sum is 55.

The spelling of 679760363521 in words is "six hundred seventy-nine billion, seven hundred sixty million, three hundred sixty-three thousand, five hundred twenty-one".