2153009 has 4 divisors (see below), whose sum is σ = 2174016. Its totient is φ = 2132004.

The previous prime is 2152973. The next prime is 2153051. The reversal of 2153009 is 9003512.

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 2153009 - 2⁸ = 2152753 is a prime.

It is an Ulam number.

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 (2153059) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10349 + ... + 10554.

It is an arithmetic number, because the mean of its divisors is an integer number (543504).

2^2153009 is an apocalyptic number.

It is an amenable number.

2153009 is a deficient number, since it is larger than the sum of its proper divisors (21007).

2153009 is a wasteful number, since it uses less digits than its factorization.

2153009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21006.

The product of its (nonzero) digits is 270, while the sum is 20.

The square root of 2153009 is about 1467.3135315944. The cubic root of 2153009 is about 129.1264709243.

The spelling of 2153009 in words is "two million, one hundred fifty-three thousand, nine".