68613817 has 2 divisors, whose sum is σ = 68613818. Its totient is φ = 68613816.

The previous prime is 68613803. The next prime is 68613827. The reversal of 68613817 is 71831686.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41615401 + 26998416 = 6451^2 + 5196^2 .

It is a cyclic number.

It is not a de Polignac number, because 68613817 - 2¹⁵ = 68581049 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68613817.

It is not a weakly prime, because it can be changed into another prime (68613827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34306908 + 34306909.

It is an arithmetic number, because the mean of its divisors is an integer number (34306909).

Almost surely, 2^68613817 is an apocalyptic number.

It is an amenable number.

68613817 is a deficient number, since it is larger than the sum of its proper divisors (1).

68613817 is an equidigital number, since it uses as much as digits as its factorization.

68613817 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 40.

The square root of 68613817 is about 8283.3457612247. The cubic root of 68613817 is about 409.3899652824.

The spelling of 68613817 in words is "sixty-eight million, six hundred thirteen thousand, eight hundred seventeen".