220322989 has 4 divisors (see below), whose sum is σ = 221931324. Its totient is φ = 218714656.

The previous prime is 220322909. The next prime is 220323007. The reversal of 220322989 is 989223022.

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

It can be written as a sum of positive squares in 2 ways, for example, as 126562500 + 93760489 = 11250^2 + 9683^2 .

It is a cyclic number.

It is not a de Polignac number, because 220322989 - 2⁹ = 220322477 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 (220322909) 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, 803962 + ... + 804235.

It is an arithmetic number, because the mean of its divisors is an integer number (55482831).

Almost surely, 2^220322989 is an apocalyptic number.

It is an amenable number.

220322989 is a deficient number, since it is larger than the sum of its proper divisors (1608335).

220322989 is a wasteful number, since it uses less digits than its factorization.

220322989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1608334.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 220322989 is about 14843.2809378520. The cubic root of 220322989 is about 603.9763570194.

The spelling of 220322989 in words is "two hundred twenty million, three hundred twenty-two thousand, nine hundred eighty-nine".