3999990973 has 16 divisors (see below), whose sum is σ = 4583952000. Its totient is φ = 3454876480.

The previous prime is 3999990949. The next prime is 3999990989. The reversal of 3999990973 is 3790999993.

3999990973 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3999990973 - 2⁹ = 3999990461 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3999990899 and 3999990908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3999990923) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15358 + ... + 90751.

It is an arithmetic number, because the mean of its divisors is an integer number (286497000).

Almost surely, 2^3999990973 is an apocalyptic number.

It is an amenable number.

3999990973 is a deficient number, since it is larger than the sum of its proper divisors (583961027).

3999990973 is a wasteful number, since it uses less digits than its factorization.

3999990973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106292.

The product of its (nonzero) digits is 33480783, while the sum is 67.

The square root of 3999990973 is about 63245.4818386262. The cubic root of 3999990973 is about 1587.3998578449.

The spelling of 3999990973 in words is "three billion, nine hundred ninety-nine million, nine hundred ninety thousand, nine hundred seventy-three".