3937999 has 16 divisors (see below), whose sum is σ = 4560192. Its totient is φ = 3368448.

The previous prime is 3937993. The next prime is 3938029. The reversal of 3937999 is 9997393.

It is a happy number.

It is not a de Polignac number, because 3937999 - 2⁹ = 3937487 is a prime.

It is a super-2 number, since 2×3937999² = 31015672248002, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3937993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22677 + ... + 22849.

It is an arithmetic number, because the mean of its divisors is an integer number (285012).

Almost surely, 2^3937999 is an apocalyptic number.

3937999 is a deficient number, since it is larger than the sum of its proper divisors (622193).

3937999 is a wasteful number, since it uses less digits than its factorization.

3937999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306.

The product of its digits is 413343, while the sum is 49.

The square root of 3937999 is about 1984.4392154964. The cubic root of 3937999 is about 157.9156602701.

The spelling of 3937999 in words is "three million, nine hundred thirty-seven thousand, nine hundred ninety-nine".