68110091 has 4 divisors (see below), whose sum is σ = 77840112. Its totient is φ = 58380072.

The previous prime is 68110043. The next prime is 68110103. The reversal of 68110091 is 19001186.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 68110091 - 2¹⁸ = 67847947 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68110091.

It is not an unprimeable number, because it can be changed into a prime (68110001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4865000 + ... + 4865013.

It is an arithmetic number, because the mean of its divisors is an integer number (19460028).

Almost surely, 2^68110091 is an apocalyptic number.

68110091 is a deficient number, since it is larger than the sum of its proper divisors (9730021).

68110091 is an equidigital number, since it uses as much as digits as its factorization.

68110091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9730020.

The product of its (nonzero) digits is 432, while the sum is 26.

The square root of 68110091 is about 8252.8837990123. The cubic root of 68110091 is about 408.3856627461.

The spelling of 68110091 in words is "sixty-eight million, one hundred ten thousand, ninety-one".