68717057 has 2 divisors, whose sum is σ = 68717058. Its totient is φ = 68717056.

The previous prime is 68717039. The next prime is 68717063. The reversal of 68717057 is 75071786.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41165056 + 27552001 = 6416^2 + 5249^2 .

It is a cyclic number.

It is not a de Polignac number, because 68717057 - 2¹⁰ = 68716033 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (68717027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34358528 + 34358529.

It is an arithmetic number, because the mean of its divisors is an integer number (34358529).

Almost surely, 2^68717057 is an apocalyptic number.

It is an amenable number.

68717057 is a deficient number, since it is larger than the sum of its proper divisors (1).

68717057 is an equidigital number, since it uses as much as digits as its factorization.

68717057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 82320, while the sum is 41.

The square root of 68717057 is about 8289.5752002138. The cubic root of 68717057 is about 409.5951923601.

The spelling of 68717057 in words is "sixty-eight million, seven hundred seventeen thousand, fifty-seven".