679987250 has 64 divisors (see below), whose sum is σ = 1356432480. Its totient is φ = 254361600.

The previous prime is 679987177. The next prime is 679987261. The reversal of 679987250 is 52789976.

It can be written as a sum of positive squares in 16 ways, for example, as 17799961 + 662187289 = 4219^2 + 25733^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 679987192 and 679987201.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 819836 + ... + 820664.

Almost surely, 2^679987250 is an apocalyptic number.

679987250 is a deficient number, since it is larger than the sum of its proper divisors (676445230).

679987250 is a wasteful number, since it uses less digits than its factorization.

679987250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1056 (or 1046 counting only the distinct ones).

The product of its (nonzero) digits is 1905120, while the sum is 53.

The square root of 679987250 is about 26076.5651495744. The cubic root of 679987250 is about 879.3604383602.

It can be divided in two parts, 6799 and 87250, that added together give a palindrome (94049).

The spelling of 679987250 in words is "six hundred seventy-nine million, nine hundred eighty-seven thousand, two hundred fifty".