3921983393 has 4 divisors (see below), whose sum is σ = 3952865280. Its totient is φ = 3891101508.

The previous prime is 3921983347. The next prime is 3921983399. The reversal of 3921983393 is 3933891293.

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 3921983393 - 2²² = 3917789089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3921983399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15440753 + ... + 15441006.

It is an arithmetic number, because the mean of its divisors is an integer number (988216320).

Almost surely, 2^3921983393 is an apocalyptic number.

It is an amenable number.

3921983393 is a deficient number, since it is larger than the sum of its proper divisors (30881887).

3921983393 is a wasteful number, since it uses less digits than its factorization.

3921983393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30881886.

The product of its digits is 944784, while the sum is 50.

The square root of 3921983393 is about 62625.7406582948. The cubic root of 3921983393 is about 1577.0129154218.

The spelling of 3921983393 in words is "three billion, nine hundred twenty-one million, nine hundred eighty-three thousand, three hundred ninety-three".