983318221 has 4 divisors (see below), whose sum is σ = 985273632. Its totient is φ = 981362812.

The previous prime is 983318213. The next prime is 983318227. The reversal of 983318221 is 122813389.

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 983318221 - 2³ = 983318213 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 (983318227) 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, 976951 + ... + 977956.

It is an arithmetic number, because the mean of its divisors is an integer number (246318408).

Almost surely, 2^983318221 is an apocalyptic number.

It is an amenable number.

983318221 is a deficient number, since it is larger than the sum of its proper divisors (1955411).

983318221 is a wasteful number, since it uses less digits than its factorization.

983318221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1955410.

The product of its digits is 20736, while the sum is 37.

The square root of 983318221 is about 31357.9052393491. The cubic root of 983318221 is about 994.4081970214.

The spelling of 983318221 in words is "nine hundred eighty-three million, three hundred eighteen thousand, two hundred twenty-one".