2160409 has 2 divisors, whose sum is σ = 2160410. Its totient is φ = 2160408.

The previous prime is 2160391. The next prime is 2160419. The reversal of 2160409 is 9040612.

2160409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1166400 + 994009 = 1080^2 + 997^2 .

It is a cyclic number.

It is not a de Polignac number, because 2160409 - 2⁹ = 2159897 is a prime.

2160409 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 2160409.

It is not a weakly prime, because it can be changed into another prime (2160419) 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 as a sum of consecutive naturals, namely, 1080204 + 1080205.

It is an arithmetic number, because the mean of its divisors is an integer number (1080205).

2^2160409 is an apocalyptic number.

It is an amenable number.

2160409 is a deficient number, since it is larger than the sum of its proper divisors (1).

2160409 is an equidigital number, since it uses as much as digits as its factorization.

2160409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 2160409 is about 1469.8329837094. The cubic root of 2160409 is about 129.2742398110.

The spelling of 2160409 in words is "two million, one hundred sixty thousand, four hundred nine".