3993937 has 4 divisors (see below), whose sum is σ = 4053616. Its totient is φ = 3934260.

The previous prime is 3993911. The next prime is 3993943. The reversal of 3993937 is 7393993.

It is a happy number.

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 a de Polignac number, because none of the positive numbers 2^k-3993937 is a prime.

It is a Duffinian number.

3993937 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 3993893 and 3993902.

It is not an unprimeable number, because it can be changed into a prime (3993907) 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, 29739 + ... + 29872.

It is an arithmetic number, because the mean of its divisors is an integer number (1013404).

Almost surely, 2^3993937 is an apocalyptic number.

It is an amenable number.

3993937 is a deficient number, since it is larger than the sum of its proper divisors (59679).

3993937 is an equidigital number, since it uses as much as digits as its factorization.

3993937 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59678.

The product of its digits is 137781, while the sum is 43.

The square root of 3993937 is about 1998.4836751898. The cubic root of 3993937 is about 158.6598612017.

The spelling of 3993937 in words is "three million, nine hundred ninety-three thousand, nine hundred thirty-seven".