3979811 has 12 divisors (see below), whose sum is σ = 4519872. Its totient is φ = 3498000.

The previous prime is 3979771. The next prime is 3979837. The reversal of 3979811 is 1189793.

It is not a de Polignac number, because 3979811 - 2¹⁸ = 3717667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3979861) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3221 + ... + 4281.

It is an arithmetic number, because the mean of its divisors is an integer number (376656).

Almost surely, 2^3979811 is an apocalyptic number.

3979811 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

3979811 is a deficient number, since it is larger than the sum of its proper divisors (540061).

3979811 is a wasteful number, since it uses less digits than its factorization.

3979811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1114 (or 1103 counting only the distinct ones).

The product of its digits is 13608, while the sum is 38.

The square root of 3979811 is about 1994.9463651938. The cubic root of 3979811 is about 158.4725876160.

The spelling of 3979811 in words is "three million, nine hundred seventy-nine thousand, eight hundred eleven".