13214309 has 4 divisors (see below), whose sum is σ = 13223904. Its totient is φ = 13204716.

The previous prime is 13214303. The next prime is 13214323. The reversal of 13214309 is 90341231.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 13214309 - 2¹² = 13210213 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 (13214303) 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, 2297 + ... + 5630.

It is an arithmetic number, because the mean of its divisors is an integer number (3305976).

Almost surely, 2^13214309 is an apocalyptic number.

It is an amenable number.

13214309 is a deficient number, since it is larger than the sum of its proper divisors (9595).

13214309 is an equidigital number, since it uses as much as digits as its factorization.

13214309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9594.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 13214309 is about 3635.1491028567. The cubic root of 13214309 is about 236.4185154936.

It can be divided in two parts, 132 and 14309, that added together give a palindrome (14441).

The spelling of 13214309 in words is "thirteen million, two hundred fourteen thousand, three hundred nine".