68621173 has 2 divisors, whose sum is σ = 68621174. Its totient is φ = 68621172.

The previous prime is 68621159. The next prime is 68621177. The reversal of 68621173 is 37112686.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56280004 + 12341169 = 7502^2 + 3513^2 .

It is a cyclic number.

It is not a de Polignac number, because 68621173 - 2¹³ = 68612981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68621177) 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 as a sum of consecutive naturals, namely, 34310586 + 34310587.

It is an arithmetic number, because the mean of its divisors is an integer number (34310587).

Almost surely, 2^68621173 is an apocalyptic number.

It is an amenable number.

68621173 is a deficient number, since it is larger than the sum of its proper divisors (1).

68621173 is an equidigital number, since it uses as much as digits as its factorization.

68621173 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12096, while the sum is 34.

The square root of 68621173 is about 8283.7897728033. The cubic root of 68621173 is about 409.4045948187.

The spelling of 68621173 in words is "sixty-eight million, six hundred twenty-one thousand, one hundred seventy-three".