3979881 has 16 divisors (see below), whose sum is σ = 5931520. Its totient is φ = 2637360.

The previous prime is 3979861. The next prime is 3979883. The reversal of 3979881 is 1889793.

It is not a de Polignac number, because 3979881 - 2⁵ = 3979849 is a prime.

It is a super-2 number, since 2×3979881² = 31678905548322, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3979883) 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, 5691 + ... + 6351.

It is an arithmetic number, because the mean of its divisors is an integer number (370720).

Almost surely, 2^3979881 is an apocalyptic number.

It is an amenable number.

3979881 is a deficient number, since it is larger than the sum of its proper divisors (1951639).

3979881 is a wasteful number, since it uses less digits than its factorization.

3979881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 893 (or 887 counting only the distinct ones).

The product of its digits is 108864, while the sum is 45.

The square root of 3979881 is about 1994.9639094480. The cubic root of 3979881 is about 158.4735167235.

The spelling of 3979881 in words is "three million, nine hundred seventy-nine thousand, eight hundred eighty-one".