68799791 has 2 divisors, whose sum is σ = 68799792. Its totient is φ = 68799790.

The previous prime is 68799769. The next prime is 68799793. The reversal of 68799791 is 19799786.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68799791 is a prime.

It is a super-2 number, since 2×68799791² = 9466822483287362, which contains 22 as substring.

Together with 68799793, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68799793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34399895 + 34399896.

It is an arithmetic number, because the mean of its divisors is an integer number (34399896).

Almost surely, 2^68799791 is an apocalyptic number.

68799791 is a deficient number, since it is larger than the sum of its proper divisors (1).

68799791 is an equidigital number, since it uses as much as digits as its factorization.

68799791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1714608, while the sum is 56.

The square root of 68799791 is about 8294.5639427278. The cubic root of 68799791 is about 409.7595079816.

The spelling of 68799791 in words is "sixty-eight million, seven hundred ninety-nine thousand, seven hundred ninety-one".