68624641 has 2 divisors, whose sum is σ = 68624642. Its totient is φ = 68624640.

The previous prime is 68624627. The next prime is 68624671. The reversal of 68624641 is 14642686.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36180225 + 32444416 = 6015^2 + 5696^2 .

It is a cyclic number.

It is not a de Polignac number, because 68624641 - 2⁵ = 68624609 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68624641.

It is not a weakly prime, because it can be changed into another prime (68624671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34312320 + 34312321.

It is an arithmetic number, because the mean of its divisors is an integer number (34312321).

Almost surely, 2^68624641 is an apocalyptic number.

It is an amenable number.

68624641 is a deficient number, since it is larger than the sum of its proper divisors (1).

68624641 is an equidigital number, since it uses as much as digits as its factorization.

68624641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 55296, while the sum is 37.

The square root of 68624641 is about 8283.9990946402. Note that the first 3 decimals coincide. The cubic root of 68624641 is about 409.4114915784.

The spelling of 68624641 in words is "sixty-eight million, six hundred twenty-four thousand, six hundred forty-one".