68639170 has 16 divisors (see below), whose sum is σ = 123865848. Its totient is φ = 27385600.

The previous prime is 68639141. The next prime is 68639209. The reversal of 68639170 is 7193686.

It can be written as a sum of positive squares in 4 ways, for example, as 53012961 + 15626209 = 7281^2 + 3953^2 .

It is a super-2 number, since 2×68639170² = 9422671316577800, which contains 22 as substring.

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, 4549 + ... + 12568.

Almost surely, 2^68639170 is an apocalyptic number.

68639170 is a deficient number, since it is larger than the sum of its proper divisors (55226678).

68639170 is a wasteful number, since it uses less digits than its factorization.

68639170 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17525.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 68639170 is about 8284.8759797597. The cubic root of 68639170 is about 409.4403826576.

The spelling of 68639170 in words is "sixty-eight million, six hundred thirty-nine thousand, one hundred seventy".