68112691 has 2 divisors, whose sum is σ = 68112692. Its totient is φ = 68112690.

The previous prime is 68112689. The next prime is 68112697. The reversal of 68112691 is 19621186.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68112691 - 2¹ = 68112689 is a prime.

It is a super-2 number, since 2×68112691² = 9278677350522962, which contains 22 as substring.

Together with 68112689, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (68112697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34056345 + 34056346.

It is an arithmetic number, because the mean of its divisors is an integer number (34056346).

Almost surely, 2^68112691 is an apocalyptic number.

68112691 is a deficient number, since it is larger than the sum of its proper divisors (1).

68112691 is an equidigital number, since it uses as much as digits as its factorization.

68112691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 34.

The square root of 68112691 is about 8253.0413182051. The cubic root of 68112691 is about 408.3908591822.

The spelling of 68112691 in words is "sixty-eight million, one hundred twelve thousand, six hundred ninety-one".