68339657 has 2 divisors, whose sum is σ = 68339658. Its totient is φ = 68339656.

The previous prime is 68339639. The next prime is 68339659. The reversal of 68339657 is 75693386.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51208336 + 17131321 = 7156^2 + 4139^2 .

It is a cyclic number.

It is not a de Polignac number, because 68339657 - 2¹⁴ = 68323273 is a prime.

Together with 68339659, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (68339659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34169828 + 34169829.

It is an arithmetic number, because the mean of its divisors is an integer number (34169829).

Almost surely, 2^68339657 is an apocalyptic number.

It is an amenable number.

68339657 is a deficient number, since it is larger than the sum of its proper divisors (1).

68339657 is an equidigital number, since it uses as much as digits as its factorization.

68339657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 816480, while the sum is 47.

The square root of 68339657 is about 8266.7803285197. The cubic root of 68339657 is about 408.8439713866.

The spelling of 68339657 in words is "sixty-eight million, three hundred thirty-nine thousand, six hundred fifty-seven".