68899739 has 2 divisors, whose sum is σ = 68899740. Its totient is φ = 68899738.

The previous prime is 68899709. The next prime is 68899741. The reversal of 68899739 is 93799886.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68899739 - 2¹² = 68895643 is a prime.

It is a Sophie Germain prime.

Together with 68899741, 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 (68899709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34449869 + 34449870.

It is an arithmetic number, because the mean of its divisors is an integer number (34449870).

Almost surely, 2^68899739 is an apocalyptic number.

68899739 is a deficient number, since it is larger than the sum of its proper divisors (1).

68899739 is an equidigital number, since it uses as much as digits as its factorization.

68899739 is an evil number, because the sum of its binary digits is even.

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

The square root of 68899739 is about 8300.5866660134. The cubic root of 68899739 is about 409.9578362352.

The spelling of 68899739 in words is "sixty-eight million, eight hundred ninety-nine thousand, seven hundred thirty-nine".