12743009 has 4 divisors (see below), whose sum is σ = 12922560. Its totient is φ = 12563460.

The previous prime is 12742993. The next prime is 12743021. The reversal of 12743009 is 90034721.

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 12743009 - 2⁴ = 12742993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12743039) 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, 89669 + ... + 89810.

It is an arithmetic number, because the mean of its divisors is an integer number (3230640).

Almost surely, 2^12743009 is an apocalyptic number.

It is an amenable number.

12743009 is a deficient number, since it is larger than the sum of its proper divisors (179551).

12743009 is an equidigital number, since it uses as much as digits as its factorization.

12743009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179550.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 12743009 is about 3569.7351442369. The cubic root of 12743009 is about 233.5737302452.

The spelling of 12743009 in words is "twelve million, seven hundred forty-three thousand, nine".