3936409 has 4 divisors (see below), whose sum is σ = 3942016. Its totient is φ = 3930804.

The previous prime is 3936353. The next prime is 3936437. The reversal of 3936409 is 9046393.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3936409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3936509) 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, 1569 + ... + 3214.

It is an arithmetic number, because the mean of its divisors is an integer number (985504).

Almost surely, 2^3936409 is an apocalyptic number.

It is an amenable number.

3936409 is a deficient number, since it is larger than the sum of its proper divisors (5607).

3936409 is an equidigital number, since it uses as much as digits as its factorization.

3936409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5606.

The product of its (nonzero) digits is 17496, while the sum is 34.

The square root of 3936409 is about 1984.0385580931. The cubic root of 3936409 is about 157.8944041533.

The spelling of 3936409 in words is "three million, nine hundred thirty-six thousand, four hundred nine".