3891979 has 16 divisors (see below), whose sum is σ = 5044480. Its totient is φ = 2916000.

The previous prime is 3891977. The next prime is 3892001. The reversal of 3891979 is 9791983.

It is a cyclic number.

It is not a de Polignac number, because 3891979 - 2¹ = 3891977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3891971) 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, 604 + ... + 2854.

It is an arithmetic number, because the mean of its divisors is an integer number (315280).

Almost surely, 2^3891979 is an apocalyptic number.

3891979 is a deficient number, since it is larger than the sum of its proper divisors (1152501).

3891979 is a wasteful number, since it uses less digits than its factorization.

3891979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2290.

The product of its digits is 122472, while the sum is 46.

The square root of 3891979 is about 1972.8099249548. The cubic root of 3891979 is about 157.2981069792.

The spelling of 3891979 in words is "three million, eight hundred ninety-one thousand, nine hundred seventy-nine".