68927561 has 2 divisors, whose sum is σ = 68927562. Its totient is φ = 68927560.

The previous prime is 68927557. The next prime is 68927587. The reversal of 68927561 is 16572986.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46308025 + 22619536 = 6805^2 + 4756^2 .

It is a cyclic number.

It is not a de Polignac number, because 68927561 - 2² = 68927557 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (68927501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34463780 + 34463781.

It is an arithmetic number, because the mean of its divisors is an integer number (34463781).

Almost surely, 2^68927561 is an apocalyptic number.

It is an amenable number.

68927561 is a deficient number, since it is larger than the sum of its proper divisors (1).

68927561 is an equidigital number, since it uses as much as digits as its factorization.

68927561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 181440, while the sum is 44.

The square root of 68927561 is about 8302.2624025021. The cubic root of 68927561 is about 410.0130097002.

The spelling of 68927561 in words is "sixty-eight million, nine hundred twenty-seven thousand, five hundred sixty-one".