12733509 has 4 divisors (see below), whose sum is σ = 16978016. Its totient is φ = 8489004.

The previous prime is 12733507. The next prime is 12733537. The reversal of 12733509 is 90533721.

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 not a de Polignac number, because 12733509 - 2¹ = 12733507 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12733507) 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, 2122249 + ... + 2122254.

It is an arithmetic number, because the mean of its divisors is an integer number (4244504).

Almost surely, 2^12733509 is an apocalyptic number.

It is an amenable number.

12733509 is a deficient number, since it is larger than the sum of its proper divisors (4244507).

12733509 is an equidigital number, since it uses as much as digits as its factorization.

12733509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4244506.

The product of its (nonzero) digits is 5670, while the sum is 30.

The square root of 12733509 is about 3568.4042652144. The cubic root of 12733509 is about 233.5156722130.

The spelling of 12733509 in words is "twelve million, seven hundred thirty-three thousand, five hundred nine".