68739899 has 2 divisors, whose sum is σ = 68739900. Its totient is φ = 68739898.

The previous prime is 68739877. The next prime is 68739901. The reversal of 68739899 is 99893786.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68739899 - 2¹⁶ = 68674363 is a prime.

Together with 68739901, 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 (68739859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34369949 + 34369950.

It is an arithmetic number, because the mean of its divisors is an integer number (34369950).

Almost surely, 2^68739899 is an apocalyptic number.

68739899 is a deficient number, since it is larger than the sum of its proper divisors (1).

68739899 is an equidigital number, since it uses as much as digits as its factorization.

68739899 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5878656, while the sum is 59.

The square root of 68739899 is about 8290.9528402953. The cubic root of 68739899 is about 409.6405713743.

The spelling of 68739899 in words is "sixty-eight million, seven hundred thirty-nine thousand, eight hundred ninety-nine".