3955409 has 4 divisors (see below), whose sum is σ = 3964416. Its totient is φ = 3946404.

The previous prime is 3955403. The next prime is 3955417. The reversal of 3955409 is 9045593.

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 not a de Polignac number, because 3955409 - 2⁸ = 3955153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3955403) 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, 3809 + ... + 4734.

It is an arithmetic number, because the mean of its divisors is an integer number (991104).

Almost surely, 2^3955409 is an apocalyptic number.

It is an amenable number.

3955409 is a deficient number, since it is larger than the sum of its proper divisors (9007).

3955409 is an equidigital number, since it uses as much as digits as its factorization.

3955409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9006.

The product of its (nonzero) digits is 24300, while the sum is 35.

The square root of 3955409 is about 1988.8210075318. The cubic root of 3955409 is about 158.1480346285.

The spelling of 3955409 in words is "three million, nine hundred fifty-five thousand, four hundred nine".