68981173 has 2 divisors, whose sum is σ = 68981174. Its totient is φ = 68981172.

The previous prime is 68981167. The next prime is 68981177. The reversal of 68981173 is 37118986.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46485124 + 22496049 = 6818^2 + 4743^2 .

It is a cyclic number.

It is not a de Polignac number, because 68981173 - 2⁹ = 68980661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68981177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34490586 + 34490587.

It is an arithmetic number, because the mean of its divisors is an integer number (34490587).

Almost surely, 2^68981173 is an apocalyptic number.

It is an amenable number.

68981173 is a deficient number, since it is larger than the sum of its proper divisors (1).

68981173 is an equidigital number, since it uses as much as digits as its factorization.

68981173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 43.

The square root of 68981173 is about 8305.4905333761. The cubic root of 68981173 is about 410.1192851412.

The spelling of 68981173 in words is "sixty-eight million, nine hundred eighty-one thousand, one hundred seventy-three".