68308957 has 2 divisors, whose sum is σ = 68308958. Its totient is φ = 68308956.

The previous prime is 68308951. The next prime is 68308963. The reversal of 68308957 is 75980386.

It is a balanced prime because it is at equal distance from previous prime (68308951) and next prime (68308963).

It can be written as a sum of positive squares in only one way, i.e., 66031876 + 2277081 = 8126^2 + 1509^2 .

It is a cyclic number.

It is not a de Polignac number, because 68308957 - 2¹⁵ = 68276189 is a prime.

It is a super-2 number, since 2×68308957² = 9332227212855698, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68308951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34154478 + 34154479.

It is an arithmetic number, because the mean of its divisors is an integer number (34154479).

Almost surely, 2^68308957 is an apocalyptic number.

It is an amenable number.

68308957 is a deficient number, since it is larger than the sum of its proper divisors (1).

68308957 is an equidigital number, since it uses as much as digits as its factorization.

68308957 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 362880, while the sum is 46.

The square root of 68308957 is about 8264.9232906301. The cubic root of 68308957 is about 408.7827410048.

The spelling of 68308957 in words is "sixty-eight million, three hundred eight thousand, nine hundred fifty-seven".