68716191 has 4 divisors (see below), whose sum is σ = 91621592. Its totient is φ = 45810792.

The previous prime is 68716189. The next prime is 68716201. The reversal of 68716191 is 19161786.

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

It is not a de Polignac number, because 68716191 - 2¹ = 68716189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68716121) 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, 11452696 + ... + 11452701.

It is an arithmetic number, because the mean of its divisors is an integer number (22905398).

Almost surely, 2^68716191 is an apocalyptic number.

68716191 is a deficient number, since it is larger than the sum of its proper divisors (22905401).

68716191 is a wasteful number, since it uses less digits than its factorization.

68716191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22905400.

The product of its digits is 18144, while the sum is 39.

The square root of 68716191 is about 8289.5229657683. The cubic root of 68716191 is about 409.5934717250.

The spelling of 68716191 in words is "sixty-eight million, seven hundred sixteen thousand, one hundred ninety-one".