3993409 has 4 divisors (see below), whose sum is σ = 4563904. Its totient is φ = 3422916.

The previous prime is 3993397. The next prime is 3993427. The reversal of 3993409 is 9043993.

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, and also an emirpimes, since its reverse is a distinct semiprime: 9043993 = 7 ⋅1291999.

It is not a de Polignac number, because 3993409 - 2⁵ = 3993377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3993469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 285237 + ... + 285250.

It is an arithmetic number, because the mean of its divisors is an integer number (1140976).

Almost surely, 2^3993409 is an apocalyptic number.

It is an amenable number.

3993409 is a deficient number, since it is larger than the sum of its proper divisors (570495).

3993409 is an equidigital number, since it uses as much as digits as its factorization.

3993409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 570494.

The product of its (nonzero) digits is 26244, while the sum is 37.

The square root of 3993409 is about 1998.3515706702. The cubic root of 3993409 is about 158.6528692621.

The spelling of 3993409 in words is "three million, nine hundred ninety-three thousand, four hundred nine".