68112391 has 2 divisors, whose sum is σ = 68112392. Its totient is φ = 68112390.

The previous prime is 68112389. The next prime is 68112413. The reversal of 68112391 is 19321186.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68112391 - 2¹ = 68112389 is a prime.

Together with 68112389, 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 (68112091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34056195 + 34056196.

It is an arithmetic number, because the mean of its divisors is an integer number (34056196).

Almost surely, 2^68112391 is an apocalyptic number.

68112391 is a deficient number, since it is larger than the sum of its proper divisors (1).

68112391 is an equidigital number, since it uses as much as digits as its factorization.

68112391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2592, while the sum is 31.

The square root of 68112391 is about 8253.0231430670. The cubic root of 68112391 is about 408.3902596001.

The spelling of 68112391 in words is "sixty-eight million, one hundred twelve thousand, three hundred ninety-one".