68289291 has 48 divisors (see below), whose sum is σ = 119508480. Its totient is φ = 38419920.

The previous prime is 68289251. The next prime is 68289293. The reversal of 68289291 is 19298286.

It is not a de Polignac number, because 68289291 - 2⁶ = 68289227 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68289293) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 93570 + ... + 94296.

It is an arithmetic number, because the mean of its divisors is an integer number (2489760).

Almost surely, 2^68289291 is an apocalyptic number.

68289291 is a deficient number, since it is larger than the sum of its proper divisors (51219189).

68289291 is a wasteful number, since it uses less digits than its factorization.

68289291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 821 (or 808 counting only the distinct ones).

The product of its digits is 124416, while the sum is 45.

The square root of 68289291 is about 8263.7334782772. The cubic root of 68289291 is about 408.7435080191.

The spelling of 68289291 in words is "sixty-eight million, two hundred eighty-nine thousand, two hundred ninety-one".