68791911 has 16 divisors (see below), whose sum is σ = 97401600. Its totient is φ = 43037568.

The previous prime is 68791909. The next prime is 68791967. The reversal of 68791911 is 11919786.

It is not a de Polignac number, because 68791911 - 2¹ = 68791909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68791901) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17550 + ... + 21108.

It is an arithmetic number, because the mean of its divisors is an integer number (6087600).

Almost surely, 2^68791911 is an apocalyptic number.

68791911 is a deficient number, since it is larger than the sum of its proper divisors (28609689).

68791911 is a wasteful number, since it uses less digits than its factorization.

68791911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3958.

The product of its digits is 27216, while the sum is 42.

The square root of 68791911 is about 8294.0889192243. The cubic root of 68791911 is about 409.7438634176.

The spelling of 68791911 in words is "sixty-eight million, seven hundred ninety-one thousand, nine hundred eleven".