3989731653 has 32 divisors (see below), whose sum is σ = 5945139200. Its totient is φ = 2644388208.

The previous prime is 3989731633. The next prime is 3989731667. The reversal of 3989731653 is 3561379893.

3989731653 is a `hidden beast` number, since 398 + 97 + 3 + 165 + 3 = 666.

It is not a de Polignac number, because 3989731653 - 2²⁰ = 3988683077 is a prime.

It is a super-2 number, since 2×3989731653² = 31835917325900224818, which contains 22 as substring.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

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 3989731653.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3989731633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5487576 + ... + 5488302.

It is an arithmetic number, because the mean of its divisors is an integer number (185785600).

Almost surely, 2^3989731653 is an apocalyptic number.

It is an amenable number.

3989731653 is a deficient number, since it is larger than the sum of its proper divisors (1955407547).

3989731653 is a wasteful number, since it uses less digits than its factorization.

3989731653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1638 (or 1632 counting only the distinct ones).

The product of its digits is 3674160, while the sum is 54.

The square root of 3989731653 is about 63164.3226275720. The cubic root of 3989731653 is about 1586.0415559198.

The spelling of 3989731653 in words is "three billion, nine hundred eighty-nine million, seven hundred thirty-one thousand, six hundred fifty-three".