983648451221 has 4 divisors (see below), whose sum is σ = 994700681100. Its totient is φ = 972596221344.

The previous prime is 983648451209. The next prime is 983648451229. The reversal of 983648451221 is 122154846389.

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 224117028100 + 759531423121 = 473410^2 + 871511^2 .

It is a cyclic number.

It is not a de Polignac number, because 983648451221 - 2³⁸ = 708770544277 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 (983648451229) 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, 5526114806 + ... + 5526114983.

It is an arithmetic number, because the mean of its divisors is an integer number (248675170275).

Almost surely, 2^983648451221 is an apocalyptic number.

It is an amenable number.

983648451221 is a deficient number, since it is larger than the sum of its proper divisors (11052229879).

983648451221 is a wasteful number, since it uses less digits than its factorization.

983648451221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11052229878.

The product of its digits is 3317760, while the sum is 53.

The spelling of 983648451221 in words is "nine hundred eighty-three billion, six hundred forty-eight million, four hundred fifty-one thousand, two hundred twenty-one".