3990041973 has 6 divisors (see below), whose sum is σ = 5763393974. Its totient is φ = 2660027976.

The previous prime is 3990041959. The next prime is 3990042073. The reversal of 3990041973 is 3791400993.

It can be written as a sum of positive squares in only one way, i.e., 3989438244 + 603729 = 63162^2 + 777^2 .

It is not a de Polignac number, because 3990041973 - 2⁸ = 3990041717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3990041953) 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, 221668990 + ... + 221669007.

Almost surely, 2^3990041973 is an apocalyptic number.

It is an amenable number.

3990041973 is a deficient number, since it is larger than the sum of its proper divisors (1773352001).

3990041973 is a wasteful number, since it uses less digits than its factorization.

3990041973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443338003 (or 443338000 counting only the distinct ones).

The product of its (nonzero) digits is 183708, while the sum is 45.

The square root of 3990041973 is about 63166.7790298033. The cubic root of 3990041973 is about 1586.0826754485.

The spelling of 3990041973 in words is "three billion, nine hundred ninety million, forty-one thousand, nine hundred seventy-three".