68868539 has 2 divisors, whose sum is σ = 68868540. Its totient is φ = 68868538.

The previous prime is 68868511. The next prime is 68868551. The reversal of 68868539 is 93586886.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68868539 - 2¹⁶ = 68803003 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (68868589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34434269 + 34434270.

It is an arithmetic number, because the mean of its divisors is an integer number (34434270).

Almost surely, 2^68868539 is an apocalyptic number.

68868539 is a deficient number, since it is larger than the sum of its proper divisors (1).

68868539 is an equidigital number, since it uses as much as digits as its factorization.

68868539 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2488320, while the sum is 53.

The square root of 68868539 is about 8298.7070679715. The cubic root of 68868539 is about 409.8959462298.

The spelling of 68868539 in words is "sixty-eight million, eight hundred sixty-eight thousand, five hundred thirty-nine".