13312399 has 2 divisors, whose sum is σ = 13312400. Its totient is φ = 13312398.

The previous prime is 13312391. The next prime is 13312433. The reversal of 13312399 is 99321331.

13312399 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (99321331) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13312399 - 2³ = 13312391 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13312399.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13312391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6656199 + 6656200.

It is an arithmetic number, because the mean of its divisors is an integer number (6656200).

Almost surely, 2^13312399 is an apocalyptic number.

13312399 is a deficient number, since it is larger than the sum of its proper divisors (1).

13312399 is an equidigital number, since it uses as much as digits as its factorization.

13312399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4374, while the sum is 31.

The square root of 13312399 is about 3648.6160389934. The cubic root of 13312399 is about 237.0020533094.

It can be divided in two parts, 1 and 3312399, that added together give a square (3312400 = 1820²).

The spelling of 13312399 in words is "thirteen million, three hundred twelve thousand, three hundred ninety-nine".