68615317 has 2 divisors, whose sum is σ = 68615318. Its totient is φ = 68615316.

The previous prime is 68615299. The next prime is 68615333. The reversal of 68615317 is 71351686.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46703556 + 21911761 = 6834^2 + 4681^2 .

It is a cyclic number.

It is not a de Polignac number, because 68615317 - 2¹¹ = 68613269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68615717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34307658 + 34307659.

It is an arithmetic number, because the mean of its divisors is an integer number (34307659).

Almost surely, 2^68615317 is an apocalyptic number.

It is an amenable number.

68615317 is a deficient number, since it is larger than the sum of its proper divisors (1).

68615317 is an equidigital number, since it uses as much as digits as its factorization.

68615317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30240, while the sum is 37.

The square root of 68615317 is about 8283.4363038536. The cubic root of 68615317 is about 409.3929485517.

The spelling of 68615317 in words is "sixty-eight million, six hundred fifteen thousand, three hundred seventeen".