68408231 has 4 divisors (see below), whose sum is σ = 68493600. Its totient is φ = 68322864.

The previous prime is 68408191. The next prime is 68408239. The reversal of 68408231 is 13280486.

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 68408231 - 2¹⁸ = 68146087 is a prime.

It is a super-2 number, since 2×68408231² = 9359372137098722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68408239) 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, 41471 + ... + 43088.

It is an arithmetic number, because the mean of its divisors is an integer number (17123400).

Almost surely, 2^68408231 is an apocalyptic number.

68408231 is a deficient number, since it is larger than the sum of its proper divisors (85369).

68408231 is an equidigital number, since it uses as much as digits as its factorization.

68408231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85368.

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 68408231 is about 8270.9268525359. The cubic root of 68408231 is about 408.9806743180.

The spelling of 68408231 in words is "sixty-eight million, four hundred eight thousand, two hundred thirty-one".