983936021 has 4 divisors (see below), whose sum is σ = 1026715872. Its totient is φ = 941156172.

The previous prime is 983936011. The next prime is 983936027. The reversal of 983936021 is 120639389.

983936021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also an emirpimes, since its reverse is a distinct semiprime: 120639389 = 13 ⋅9279953.

It is a cyclic number.

It is not a de Polignac number, because 983936021 - 2¹⁴ = 983919637 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 983936021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (983936027) 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, 21389891 + ... + 21389936.

It is an arithmetic number, because the mean of its divisors is an integer number (256678968).

Almost surely, 2^983936021 is an apocalyptic number.

It is an amenable number.

983936021 is a deficient number, since it is larger than the sum of its proper divisors (42779851).

983936021 is a wasteful number, since it uses less digits than its factorization.

983936021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42779850.

The product of its (nonzero) digits is 69984, while the sum is 41.

The square root of 983936021 is about 31367.7544781261. The cubic root of 983936021 is about 994.6164092954.

The spelling of 983936021 in words is "nine hundred eighty-three million, nine hundred thirty-six thousand, twenty-one".