68238191 has 4 divisors (see below), whose sum is σ = 77986512. Its totient is φ = 58489872.

The previous prime is 68238173. The next prime is 68238197. The reversal of 68238191 is 19183286.

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

It is not a de Polignac number, because 68238191 - 2⁶ = 68238127 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 (68238197) 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, 4874150 + ... + 4874163.

It is an arithmetic number, because the mean of its divisors is an integer number (19496628).

Almost surely, 2^68238191 is an apocalyptic number.

68238191 is a deficient number, since it is larger than the sum of its proper divisors (9748321).

68238191 is an equidigital number, since it uses as much as digits as its factorization.

68238191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9748320.

The product of its digits is 20736, while the sum is 38.

The square root of 68238191 is about 8260.6410768172. The cubic root of 68238191 is about 408.6415300716.

The spelling of 68238191 in words is "sixty-eight million, two hundred thirty-eight thousand, one hundred ninety-one".