68885657 has 2 divisors, whose sum is σ = 68885658. Its totient is φ = 68885656.

The previous prime is 68885651. The next prime is 68885723. The reversal of 68885657 is 75658886.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52693081 + 16192576 = 7259^2 + 4024^2 .

It is a cyclic number.

It is not a de Polignac number, because 68885657 - 2²⁶ = 1776793 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 68885599 and 68885608.

It is not a weakly prime, because it can be changed into another prime (68885651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34442828 + 34442829.

It is an arithmetic number, because the mean of its divisors is an integer number (34442829).

Almost surely, 2^68885657 is an apocalyptic number.

It is an amenable number.

68885657 is a deficient number, since it is larger than the sum of its proper divisors (1).

68885657 is an equidigital number, since it uses as much as digits as its factorization.

68885657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3225600, while the sum is 53.

The square root of 68885657 is about 8299.7383693704. The cubic root of 68885657 is about 409.9299047332.

The spelling of 68885657 in words is "sixty-eight million, eight hundred eighty-five thousand, six hundred fifty-seven".