68108291 has 2 divisors, whose sum is σ = 68108292. Its totient is φ = 68108290.

The previous prime is 68108281. The next prime is 68108297. The reversal of 68108291 is 19280186.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68108291 is a prime.

It is not a weakly prime, because it can be changed into another prime (68108297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34054145 + 34054146.

It is an arithmetic number, because the mean of its divisors is an integer number (34054146).

Almost surely, 2^68108291 is an apocalyptic number.

68108291 is a deficient number, since it is larger than the sum of its proper divisors (1).

68108291 is an equidigital number, since it uses as much as digits as its factorization.

68108291 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 35.

The square root of 68108291 is about 8252.7747455023. The cubic root of 68108291 is about 408.3820651359.

The spelling of 68108291 in words is "sixty-eight million, one hundred eight thousand, two hundred ninety-one".