2308409 has 4 divisors (see below), whose sum is σ = 2311680. Its totient is φ = 2305140.

The previous prime is 2308403. The next prime is 2308417. The reversal of 2308409 is 9048032.

2308409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2308409 - 2¹⁶ = 2242873 is a prime.

It is a super-2 number, since 2×2308409² = 10657504222562, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2308403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89 + ... + 2150.

It is an arithmetic number, because the mean of its divisors is an integer number (577920).

2^2308409 is an apocalyptic number.

It is an amenable number.

2308409 is a deficient number, since it is larger than the sum of its proper divisors (3271).

2308409 is a wasteful number, since it uses less digits than its factorization.

2308409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3270.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 2308409 is about 1519.3449246303. The cubic root of 2308409 is about 132.1612850991.

The spelling of 2308409 in words is "two million, three hundred eight thousand, four hundred nine".