679925690 has 32 divisors (see below), whose sum is σ = 1260297360. Its totient is φ = 263913984.

The previous prime is 679925567. The next prime is 679925699. The reversal of 679925690 is 96529976.

It can be written as a sum of positive squares in 8 ways, for example, as 679592761 + 332929 = 26069^2 + 577^2 .

It is a super-2 number, since 2×679925690² = 924597887843952200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (679925699) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 149084 + ... + 153576.

Almost surely, 2^679925690 is an apocalyptic number.

679925690 is a deficient number, since it is larger than the sum of its proper divisors (580371670).

679925690 is a wasteful number, since it uses less digits than its factorization.

679925690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4946.

The product of its (nonzero) digits is 1837080, while the sum is 53.

The square root of 679925690 is about 26075.3847526743. The cubic root of 679925690 is about 879.3339010674. Note that the first 3 decimals are identical.

The spelling of 679925690 in words is "six hundred seventy-nine million, nine hundred twenty-five thousand, six hundred ninety".