68122091 has 2 divisors, whose sum is σ = 68122092. Its totient is φ = 68122090.

The previous prime is 68122063. The next prime is 68122099. The reversal of 68122091 is 19022186.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68122091 - 2⁶ = 68122027 is a prime.

It is not a weakly prime, because it can be changed into another prime (68122099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34061045 + 34061046.

It is an arithmetic number, because the mean of its divisors is an integer number (34061046).

Almost surely, 2^68122091 is an apocalyptic number.

68122091 is a deficient number, since it is larger than the sum of its proper divisors (1).

68122091 is an equidigital number, since it uses as much as digits as its factorization.

68122091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 68122091 is about 8253.6107855895. The cubic root of 68122091 is about 408.4096451942.

The spelling of 68122091 in words is "sixty-eight million, one hundred twenty-two thousand, ninety-one".