89817321 has 32 divisors (see below), whose sum is σ = 136396800. Its totient is φ = 52073280.

The previous prime is 89817289. The next prime is 89817331. The reversal of 89817321 is 12371898.

It is not a de Polignac number, because 89817321 - 2⁵ = 89817289 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 89817321.

It is not an unprimeable number, because it can be changed into a prime (89817331) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 121170 + ... + 121908.

It is an arithmetic number, because the mean of its divisors is an integer number (4262400).

Almost surely, 2^89817321 is an apocalyptic number.

It is an amenable number.

89817321 is a deficient number, since it is larger than the sum of its proper divisors (46579479).

89817321 is a wasteful number, since it uses less digits than its factorization.

89817321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 909.

The product of its digits is 24192, while the sum is 39.

The square root of 89817321 is about 9477.2000611995. The cubic root of 89817321 is about 447.8370624119.

The spelling of 89817321 in words is "eighty-nine million, eight hundred seventeen thousand, three hundred twenty-one".