3999137937 has 4 divisors (see below), whose sum is σ = 5332183920. Its totient is φ = 2666091956.

The previous prime is 3999137911. The next prime is 3999137969. The reversal of 3999137937 is 7397319993.

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 3999137937 - 2⁶ = 3999137873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3999138937) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 666522987 + ... + 666522992.

It is an arithmetic number, because the mean of its divisors is an integer number (1333045980).

Almost surely, 2^3999137937 is an apocalyptic number.

It is an amenable number.

3999137937 is a deficient number, since it is larger than the sum of its proper divisors (1333045983).

3999137937 is a wasteful number, since it uses less digits than its factorization.

3999137937 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1333045982.

The product of its digits is 8680203, while the sum is 60.

The square root of 3999137937 is about 63238.7376297155. The cubic root of 3999137937 is about 1587.2870071322.

The spelling of 3999137937 in words is "three billion, nine hundred ninety-nine million, one hundred thirty-seven thousand, nine hundred thirty-seven".