2053409 has 4 divisors (see below), whose sum is σ = 2119680. Its totient is φ = 1987140.

The previous prime is 2053397. The next prime is 2053411. The reversal of 2053409 is 9043502.

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.

It is a cyclic number.

It is not a de Polignac number, because 2053409 - 2¹⁶ = 1987873 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2053439) 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, 33089 + ... + 33150.

It is an arithmetic number, because the mean of its divisors is an integer number (529920).

2^2053409 is an apocalyptic number.

It is an amenable number.

2053409 is a deficient number, since it is larger than the sum of its proper divisors (66271).

2053409 is an equidigital number, since it uses as much as digits as its factorization.

2053409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66270.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 2053409 is about 1432.9720862599. The cubic root of 2053409 is about 127.1037860360.

The spelling of 2053409 in words is "two million, fifty-three thousand, four hundred nine".