13309223 has 4 divisors (see below), whose sum is σ = 13337040. Its totient is φ = 13281408.

The previous prime is 13309217. The next prime is 13309229. The reversal of 13309223 is 32290331.

13309223 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 an emirpimes, since its reverse is a distinct semiprime: 32290331 = 3181 ⋅10151.

It is an interprime number because it is at equal distance from previous prime (13309217) and next prime (13309229).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13309223 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 (13309229) 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, 13178 + ... + 14151.

It is an arithmetic number, because the mean of its divisors is an integer number (3334260).

Almost surely, 2^13309223 is an apocalyptic number.

13309223 is a deficient number, since it is larger than the sum of its proper divisors (27817).

13309223 is an equidigital number, since it uses as much as digits as its factorization.

13309223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27816.

The product of its (nonzero) digits is 972, while the sum is 23.

The square root of 13309223 is about 3648.1807795119. The cubic root of 13309223 is about 236.9832042552.

Adding to 13309223 its reverse (32290331), we get a palindrome (45599554).

The spelling of 13309223 in words is "thirteen million, three hundred nine thousand, two hundred twenty-three".