3956609 has 4 divisors (see below), whose sum is σ = 4031316. Its totient is φ = 3881904.

The previous prime is 3956587. The next prime is 3956639. The reversal of 3956609 is 9066593.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3073009 + 883600 = 1753^2 + 940^2 .

It is a cyclic number.

It is not a de Polignac number, because 3956609 - 2⁸ = 3956353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3956639) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37274 + ... + 37379.

It is an arithmetic number, because the mean of its divisors is an integer number (1007829).

Almost surely, 2^3956609 is an apocalyptic number.

It is an amenable number.

3956609 is a deficient number, since it is larger than the sum of its proper divisors (74707).

3956609 is an equidigital number, since it uses as much as digits as its factorization.

3956609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74706.

The product of its (nonzero) digits is 43740, while the sum is 38.

The square root of 3956609 is about 1989.1226709281. The cubic root of 3956609 is about 158.1640261019.

The spelling of 3956609 in words is "three million, nine hundred fifty-six thousand, six hundred nine".