68789321 has 4 divisors (see below), whose sum is σ = 69618192. Its totient is φ = 67960452.

The previous prime is 68789269. The next prime is 68789323. The reversal of 68789321 is 12398786.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 68789321 - 2²⁶ = 1680457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68789323) 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, 414311 + ... + 414476.

It is an arithmetic number, because the mean of its divisors is an integer number (17404548).

Almost surely, 2^68789321 is an apocalyptic number.

It is an amenable number.

68789321 is a deficient number, since it is larger than the sum of its proper divisors (828871).

68789321 is an equidigital number, since it uses as much as digits as its factorization.

68789321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 828870.

The product of its digits is 145152, while the sum is 44.

The square root of 68789321 is about 8293.9327824621. The cubic root of 68789321 is about 409.7387210982.

The spelling of 68789321 in words is "sixty-eight million, seven hundred eighty-nine thousand, three hundred twenty-one".