12703309 has 4 divisors (see below), whose sum is σ = 12717216. Its totient is φ = 12689404.

The previous prime is 12703307. The next prime is 12703357. The reversal of 12703309 is 90330721.

12703309 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also an emirpimes, since its reverse is a distinct semiprime: 90330721 = 13 ⋅6948517.

It is a cyclic number.

It is not a de Polignac number, because 12703309 - 2¹ = 12703307 is a prime.

It is a super-2 number, since 2×12703309² = 322748119098962, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12703303) 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, 5479 + ... + 7444.

It is an arithmetic number, because the mean of its divisors is an integer number (3179304).

Almost surely, 2^12703309 is an apocalyptic number.

It is an amenable number.

12703309 is a deficient number, since it is larger than the sum of its proper divisors (13907).

12703309 is an equidigital number, since it uses as much as digits as its factorization.

12703309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13906.

The product of its (nonzero) digits is 1134, while the sum is 25.

The square root of 12703309 is about 3564.1701698993. The cubic root of 12703309 is about 233.3309167550.

The spelling of 12703309 in words is "twelve million, seven hundred three thousand, three hundred nine".