3973372921 has 32 divisors (see below), whose sum is σ = 4685700096. Its totient is φ = 3299400000.

The previous prime is 3973372913. The next prime is 3973372933. The reversal of 3973372921 is 1292733793.

It is a cyclic number.

It is not a de Polignac number, because 3973372921 - 2³ = 3973372913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3973372721) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14040046 + ... + 14040328.

It is an arithmetic number, because the mean of its divisors is an integer number (146428128).

Almost surely, 2^3973372921 is an apocalyptic number.

It is an amenable number.

3973372921 is a deficient number, since it is larger than the sum of its proper divisors (712327175).

3973372921 is a wasteful number, since it uses less digits than its factorization.

3973372921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 733.

The product of its digits is 428652, while the sum is 46.

The square root of 3973372921 is about 63034.6961680629. The cubic root of 3973372921 is about 1583.8708860735.

The spelling of 3973372921 in words is "three billion, nine hundred seventy-three million, three hundred seventy-two thousand, nine hundred twenty-one".