679987251 has 16 divisors (see below), whose sum is σ = 1030817920. Its totient is φ = 442781640.

The previous prime is 679987177. The next prime is 679987261. The reversal of 679987251 is 152789976.

It is not a de Polignac number, because 679987251 - 2¹⁰ = 679986227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (679987261) 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 15 ways as a sum of consecutive naturals, for example, 291685 + ... + 294006.

It is an arithmetic number, because the mean of its divisors is an integer number (64426120).

Almost surely, 2^679987251 is an apocalyptic number.

679987251 is a deficient number, since it is larger than the sum of its proper divisors (350830669).

679987251 is a wasteful number, since it uses less digits than its factorization.

679987251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 585743 (or 585737 counting only the distinct ones).

The product of its digits is 1905120, while the sum is 54.

The square root of 679987251 is about 26076.5651687487. The cubic root of 679987251 is about 879.3604387913.

The spelling of 679987251 in words is "six hundred seventy-nine million, nine hundred eighty-seven thousand, two hundred fifty-one".