3979823931 has 6 divisors (see below), whose sum is σ = 5748634580. Its totient is φ = 2653215948.

The previous prime is 3979823909. The next prime is 3979823941. The reversal of 3979823931 is 1393289793.

It is not a de Polignac number, because 3979823931 - 2¹⁰ = 3979822907 is a prime.

It is a super-2 number, since 2×3979823931² = 31677997043520585522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3979823941) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 221101321 + ... + 221101338.

Almost surely, 2^3979823931 is an apocalyptic number.

3979823931 is a deficient number, since it is larger than the sum of its proper divisors (1768810649).

3979823931 is a wasteful number, since it uses less digits than its factorization.

3979823931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 442202665 (or 442202662 counting only the distinct ones).

The product of its digits is 2204496, while the sum is 54.

The square root of 3979823931 is about 63085.8457262800. The cubic root of 3979823931 is about 1584.7275924956.

The spelling of 3979823931 in words is "three billion, nine hundred seventy-nine million, eight hundred twenty-three thousand, nine hundred thirty-one".