68097391 has 2 divisors, whose sum is σ = 68097392. Its totient is φ = 68097390.

The previous prime is 68097389. The next prime is 68097401. The reversal of 68097391 is 19379086.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68097391 - 2¹ = 68097389 is a prime.

It is a super-2 number, since 2×68097391² = 9274509322013762, which contains 22 as substring.

Together with 68097389, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68097301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34048695 + 34048696.

It is an arithmetic number, because the mean of its divisors is an integer number (34048696).

Almost surely, 2^68097391 is an apocalyptic number.

68097391 is a deficient number, since it is larger than the sum of its proper divisors (1).

68097391 is an equidigital number, since it uses as much as digits as its factorization.

68097391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81648, while the sum is 43.

The square root of 68097391 is about 8252.1143351265. The cubic root of 68097391 is about 408.3602782534.

The spelling of 68097391 in words is "sixty-eight million, ninety-seven thousand, three hundred ninety-one".