12800309 has 4 divisors (see below), whose sum is σ = 13072704. Its totient is φ = 12527916.

The previous prime is 12800299. The next prime is 12800311. The reversal of 12800309 is 90300821.

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 12800309 - 2¹² = 12796213 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 (12800329) 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, 136127 + ... + 136220.

It is an arithmetic number, because the mean of its divisors is an integer number (3268176).

Almost surely, 2^12800309 is an apocalyptic number.

It is an amenable number.

12800309 is a deficient number, since it is larger than the sum of its proper divisors (272395).

12800309 is an equidigital number, since it uses as much as digits as its factorization.

12800309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272394.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 12800309 is about 3577.7519478019. The cubic root of 12800309 is about 233.9233013783.

The spelling of 12800309 in words is "twelve million, eight hundred thousand, three hundred nine".