68712170 has 16 divisors (see below), whose sum is σ = 130191840. Its totient is φ = 26038224.

The previous prime is 68712157. The next prime is 68712173. The reversal of 68712170 is 7121786.

It is a super-2 number, since 2×68712170² = 9442724612217800, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (68712173) 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 7 ways as a sum of consecutive naturals, for example, 180632 + ... + 181011.

It is an arithmetic number, because the mean of its divisors is an integer number (8136990).

Almost surely, 2^68712170 is an apocalyptic number.

68712170 is a deficient number, since it is larger than the sum of its proper divisors (61479670).

68712170 is a wasteful number, since it uses less digits than its factorization.

68712170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361669.

The product of its (nonzero) digits is 4704, while the sum is 32.

The square root of 68712170 is about 8289.2804271541. The cubic root of 68712170 is about 409.5854823053.

The spelling of 68712170 in words is "sixty-eight million, seven hundred twelve thousand, one hundred seventy".