2409 has 8 divisors (see below), whose sum is σ = 3552. Its totient is φ = 1440.

The previous prime is 2399. The next prime is 2411. The reversal of 2409 is 9042.

2409 is nontrivially palindromic in base 2 and base 16.

2409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2409 - 2⁴ = 2393 is a prime.

It is a Smith number, since the sum of its digits (15) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

2409 is an undulating number in base 16.

2409 is a lucky number.

It is a plaindrome in base 12 and base 13.

It is a nialpdrome in base 14 and base 15.

It is not an unprimeable number, because it can be changed into a prime (2459) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4 + ... + 69.

It is an arithmetic number, because the mean of its divisors is an integer number (444).

2²⁴⁰⁹ is an apocalyptic number.

It is an amenable number.

2409 is a deficient number, since it is larger than the sum of its proper divisors (1143).

2409 is a wasteful number, since it uses less digits than its factorization.

2409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 2409 is about 49.0815647672. The cubic root of 2409 is about 13.4053739491.

It can be divided in two parts, 2 and 409, that multiplied together give a palindrome (818).

The spelling of 2409 in words is "two thousand, four hundred nine".