68013791 has 2 divisors, whose sum is σ = 68013792. Its totient is φ = 68013790.

The previous prime is 68013731. The next prime is 68013817. The reversal of 68013791 is 19731086.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68013791 - 2⁶ = 68013727 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68013731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34006895 + 34006896.

It is an arithmetic number, because the mean of its divisors is an integer number (34006896).

Almost surely, 2^68013791 is an apocalyptic number.

68013791 is a deficient number, since it is larger than the sum of its proper divisors (1).

68013791 is an equidigital number, since it uses as much as digits as its factorization.

68013791 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 68013791 is about 8247.0474110435. The cubic root of 68013791 is about 408.1931015155.

The spelling of 68013791 in words is "sixty-eight million, thirteen thousand, seven hundred ninety-one".