68915699 has 2 divisors, whose sum is σ = 68915700. Its totient is φ = 68915698.

The previous prime is 68915669. The next prime is 68915701. The reversal of 68915699 is 99651986.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68915699 - 2⁸ = 68915443 is a prime.

Together with 68915701, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68915699.

It is not a weakly prime, because it can be changed into another prime (68915669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34457849 + 34457850.

It is an arithmetic number, because the mean of its divisors is an integer number (34457850).

Almost surely, 2^68915699 is an apocalyptic number.

68915699 is a deficient number, since it is larger than the sum of its proper divisors (1).

68915699 is an equidigital number, since it uses as much as digits as its factorization.

68915699 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1049760, while the sum is 53.

The square root of 68915699 is about 8301.5479881767. The cubic root of 68915699 is about 409.9894881303.

The spelling of 68915699 in words is "sixty-eight million, nine hundred fifteen thousand, six hundred ninety-nine".