3988937 has 4 divisors (see below), whose sum is σ = 4073856. Its totient is φ = 3904020.

The previous prime is 3988909. The next prime is 3988961. The reversal of 3988937 is 7398893.

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 3988937 - 2⁸ = 3988681 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (47), and also a Moran number because the ratio is a prime number: 84871 = 3988937 / (3 + 9 + 8 + 8 + 9 + 3 + 7).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3988891 and 3988900.

It is not an unprimeable number, because it can be changed into a prime (3981937) 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, 42389 + ... + 42482.

It is an arithmetic number, because the mean of its divisors is an integer number (1018464).

Almost surely, 2^3988937 is an apocalyptic number.

It is an amenable number.

3988937 is a deficient number, since it is larger than the sum of its proper divisors (84919).

3988937 is an equidigital number, since it uses as much as digits as its factorization.

3988937 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84918.

The product of its digits is 326592, while the sum is 47.

The square root of 3988937 is about 1997.2323350076. The cubic root of 3988937 is about 158.5936249225.

The spelling of 3988937 in words is "three million, nine hundred eighty-eight thousand, nine hundred thirty-seven".