68086391 has 2 divisors, whose sum is σ = 68086392. Its totient is φ = 68086390.

The previous prime is 68086357. The next prime is 68086393. The reversal of 68086391 is 19368086.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68086391 - 2¹⁸ = 67824247 is a prime.

Together with 68086393, 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 (68086393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34043195 + 34043196.

It is an arithmetic number, because the mean of its divisors is an integer number (34043196).

Almost surely, 2^68086391 is an apocalyptic number.

68086391 is a deficient number, since it is larger than the sum of its proper divisors (1).

68086391 is an equidigital number, since it uses as much as digits as its factorization.

68086391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 68086391 is about 8251.4478123539. The cubic root of 68086391 is about 408.3382891342.

The spelling of 68086391 in words is "sixty-eight million, eighty-six thousand, three hundred ninety-one".