13823309 has 2 divisors, whose sum is σ = 13823310. Its totient is φ = 13823308.

The previous prime is 13823281. The next prime is 13823333. The reversal of 13823309 is 90332831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12075625 + 1747684 = 3475^2 + 1322^2 .

It is a cyclic number.

It is not a de Polignac number, because 13823309 - 2¹⁶ = 13757773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13823209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6911654 + 6911655.

It is an arithmetic number, because the mean of its divisors is an integer number (6911655).

Almost surely, 2^13823309 is an apocalyptic number.

It is an amenable number.

13823309 is a deficient number, since it is larger than the sum of its proper divisors (1).

13823309 is an equidigital number, since it uses as much as digits as its factorization.

13823309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 13823309 is about 3717.9710864933. The cubic root of 13823309 is about 239.9960010908.

The spelling of 13823309 in words is "thirteen million, eight hundred twenty-three thousand, three hundred nine".