68426791 has 2 divisors, whose sum is σ = 68426792. Its totient is φ = 68426790.

The previous prime is 68426779. The next prime is 68426833. The reversal of 68426791 is 19762486.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68426791 - 2⁵ = 68426759 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68426731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34213395 + 34213396.

It is an arithmetic number, because the mean of its divisors is an integer number (34213396).

Almost surely, 2^68426791 is an apocalyptic number.

68426791 is a deficient number, since it is larger than the sum of its proper divisors (1).

68426791 is an equidigital number, since it uses as much as digits as its factorization.

68426791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 43.

The square root of 68426791 is about 8272.0487788697. The cubic root of 68426791 is about 409.0176581469.

The spelling of 68426791 in words is "sixty-eight million, four hundred twenty-six thousand, seven hundred ninety-one".