2168409 has 8 divisors (see below), whose sum is σ = 2903040. Its totient is φ = 1439696.

The previous prime is 2168407. The next prime is 2168429. The reversal of 2168409 is 9048612.

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

It is a cyclic number.

It is not a de Polignac number, because 2168409 - 2¹ = 2168407 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2168407) 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, 537 + ... + 2150.

It is an arithmetic number, because the mean of its divisors is an integer number (362880).

2^2168409 is an apocalyptic number.

It is an amenable number.

2168409 is a deficient number, since it is larger than the sum of its proper divisors (734631).

2168409 is a wasteful number, since it uses less digits than its factorization.

2168409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2959.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 2168409 is about 1472.5518666587. The cubic root of 2168409 is about 129.4336108679.

The spelling of 2168409 in words is "two million, one hundred sixty-eight thousand, four hundred nine".