68018257 has 2 divisors, whose sum is σ = 68018258. Its totient is φ = 68018256.

The previous prime is 68018231. The next prime is 68018263. The reversal of 68018257 is 75281086.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58507201 + 9511056 = 7649^2 + 3084^2 .

It is a cyclic number.

It is not a de Polignac number, because 68018257 - 2⁷ = 68018129 is a prime.

It is not a weakly prime, because it can be changed into another prime (68018227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34009128 + 34009129.

It is an arithmetic number, because the mean of its divisors is an integer number (34009129).

Almost surely, 2^68018257 is an apocalyptic number.

It is an amenable number.

68018257 is a deficient number, since it is larger than the sum of its proper divisors (1).

68018257 is an equidigital number, since it uses as much as digits as its factorization.

68018257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26880, while the sum is 37.

The square root of 68018257 is about 8247.3181701690. The cubic root of 68018257 is about 408.2020357354.

The spelling of 68018257 in words is "sixty-eight million, eighteen thousand, two hundred fifty-seven".