68212657 has 2 divisors, whose sum is σ = 68212658. Its totient is φ = 68212656.

The previous prime is 68212649. The next prime is 68212667. The reversal of 68212657 is 75621286.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65950641 + 2262016 = 8121^2 + 1504^2 .

It is a cyclic number.

It is not a de Polignac number, because 68212657 - 2³ = 68212649 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (68212667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34106328 + 34106329.

It is an arithmetic number, because the mean of its divisors is an integer number (34106329).

Almost surely, 2^68212657 is an apocalyptic number.

It is an amenable number.

68212657 is a deficient number, since it is larger than the sum of its proper divisors (1).

68212657 is an equidigital number, since it uses as much as digits as its factorization.

68212657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40320, while the sum is 37.

The square root of 68212657 is about 8259.0954105156. The cubic root of 68212657 is about 408.5905539520.

The spelling of 68212657 in words is "sixty-eight million, two hundred twelve thousand, six hundred fifty-seven".