3981837 has 16 divisors (see below), whose sum is σ = 5495040. Its totient is φ = 2563392.

The previous prime is 3981833. The next prime is 3981839. The reversal of 3981837 is 7381893.

It is not a de Polignac number, because 3981837 - 2² = 3981833 is a prime.

It is a nialpdrome in base 13.

It is a junction number, because it is equal to n+sod(n) for n = 3981795 and 3981804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3981833) 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, 12403 + ... + 12719.

It is an arithmetic number, because the mean of its divisors is an integer number (343440).

Almost surely, 2^3981837 is an apocalyptic number.

It is an amenable number.

3981837 is a deficient number, since it is larger than the sum of its proper divisors (1513203).

3981837 is a wasteful number, since it uses less digits than its factorization.

3981837 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 452.

The product of its digits is 36288, while the sum is 39.

The square root of 3981837 is about 1995.4540836612. The cubic root of 3981837 is about 158.4994742359.

The spelling of 3981837 in words is "three million, nine hundred eighty-one thousand, eight hundred thirty-seven".