68712173 has 2 divisors, whose sum is σ = 68712174. Its totient is φ = 68712172.

The previous prime is 68712157. The next prime is 68712179. The reversal of 68712173 is 37121786.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61811044 + 6901129 = 7862^2 + 2627^2 .

It is a cyclic number.

It is not a de Polignac number, because 68712173 - 2⁴ = 68712157 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68712179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34356086 + 34356087.

It is an arithmetic number, because the mean of its divisors is an integer number (34356087).

Almost surely, 2^68712173 is an apocalyptic number.

It is an amenable number.

68712173 is a deficient number, since it is larger than the sum of its proper divisors (1).

68712173 is an equidigital number, since it uses as much as digits as its factorization.

68712173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14112, while the sum is 35.

The square root of 68712173 is about 8289.2806081107. The cubic root of 68712173 is about 409.5854882662.

The spelling of 68712173 in words is "sixty-eight million, seven hundred twelve thousand, one hundred seventy-three".