3995091 has 6 divisors (see below), whose sum is σ = 5770700. Its totient is φ = 2663388.

The previous prime is 3995083. The next prime is 3995093. The reversal of 3995091 is 1905993.

It is not a de Polignac number, because 3995091 - 2³ = 3995083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3995093) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 221941 + ... + 221958.

Almost surely, 2^3995091 is an apocalyptic number.

3995091 is a deficient number, since it is larger than the sum of its proper divisors (1775609).

3995091 is a wasteful number, since it uses less digits than its factorization.

3995091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443905 (or 443902 counting only the distinct ones).

The product of its (nonzero) digits is 10935, while the sum is 36.

The square root of 3995091 is about 1998.7723732331. The cubic root of 3995091 is about 158.6751406823.

The spelling of 3995091 in words is "three million, nine hundred ninety-five thousand, ninety-one".