3995909 has 6 divisors (see below), whose sum is σ = 4217670. Its totient is φ = 3785256.

The previous prime is 3995903. The next prime is 3995921. The reversal of 3995909 is 9095993.

It can be written as a sum of positive squares in only one way, i.e., 2608225 + 1387684 = 1615^2 + 1178^2 .

It is not a de Polignac number, because 3995909 - 2⁸ = 3995653 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3995909.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3995903) 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, 5174 + ... + 5895.

It is an arithmetic number, because the mean of its divisors is an integer number (702945).

Almost surely, 2^3995909 is an apocalyptic number.

It is an amenable number.

3995909 is a deficient number, since it is larger than the sum of its proper divisors (221761).

3995909 is a wasteful number, since it uses less digits than its factorization.

3995909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11107 (or 11088 counting only the distinct ones).

The product of its (nonzero) digits is 98415, while the sum is 44.

The square root of 3995909 is about 1998.9769883618. The cubic root of 3995909 is about 158.6859695894.

The spelling of 3995909 in words is "three million, nine hundred ninety-five thousand, nine hundred nine".