3879981 has 24 divisors (see below), whose sum is σ = 6645184. Its totient is φ = 2216160.

The previous prime is 3879979. The next prime is 3879983. The reversal of 3879981 is 1899783.

It is an interprime number because it is at equal distance from previous prime (3879979) and next prime (3879983).

It is not a de Polignac number, because 3879981 - 2¹ = 3879979 is a prime.

It is a super-2 number, since 2×3879981² = 30108505120722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3879983) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 561 + ... + 2841.

Almost surely, 2^3879981 is an apocalyptic number.

It is an amenable number.

3879981 is a deficient number, since it is larger than the sum of its proper divisors (2765203).

3879981 is an equidigital number, since it uses as much as digits as its factorization.

3879981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2303 (or 2291 counting only the distinct ones).

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

The square root of 3879981 is about 1969.7667374590. The cubic root of 3879981 is about 157.1363036622.

The spelling of 3879981 in words is "three million, eight hundred seventy-nine thousand, nine hundred eighty-one".