68912621 has 2 divisors, whose sum is σ = 68912622. Its totient is φ = 68912620.

The previous prime is 68912593. The next prime is 68912629. The reversal of 68912621 is 12621986.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64561225 + 4351396 = 8035^2 + 2086^2 .

It is a cyclic number.

It is not a de Polignac number, because 68912621 - 2²² = 64718317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68912629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34456310 + 34456311.

It is an arithmetic number, because the mean of its divisors is an integer number (34456311).

Almost surely, 2^68912621 is an apocalyptic number.

It is an amenable number.

68912621 is a deficient number, since it is larger than the sum of its proper divisors (1).

68912621 is an equidigital number, since it uses as much as digits as its factorization.

68912621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 35.

The square root of 68912621 is about 8301.3625989954. The cubic root of 68912621 is about 409.9833842166.

The spelling of 68912621 in words is "sixty-eight million, nine hundred twelve thousand, six hundred twenty-one".