2164409 has 8 divisors (see below), whose sum is σ = 2342592. Its totient is φ = 1987920.

The previous prime is 2164399. The next prime is 2164417. The reversal of 2164409 is 9044612.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2164409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2164429) 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, 4052 + ... + 4554.

It is an arithmetic number, because the mean of its divisors is an integer number (292824).

2^2164409 is an apocalyptic number.

It is an amenable number.

2164409 is a deficient number, since it is larger than the sum of its proper divisors (178183).

2164409 is a wasteful number, since it uses less digits than its factorization.

2164409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 847.

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

The square root of 2164409 is about 1471.1930532734. The cubic root of 2164409 is about 129.3539744279.

The spelling of 2164409 in words is "two million, one hundred sixty-four thousand, four hundred nine".