13320399 has 4 divisors (see below), whose sum is σ = 17760536. Its totient is φ = 8880264.

The previous prime is 13320397. The next prime is 13320409. The reversal of 13320399 is 99302331.

13320399 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.

It is not a de Polignac number, because 13320399 - 2¹ = 13320397 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 (13320397) 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, 2220064 + ... + 2220069.

It is an arithmetic number, because the mean of its divisors is an integer number (4440134).

Almost surely, 2^13320399 is an apocalyptic number.

13320399 is a deficient number, since it is larger than the sum of its proper divisors (4440137).

13320399 is an equidigital number, since it uses as much as digits as its factorization.

13320399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4440136.

The product of its (nonzero) digits is 4374, while the sum is 30.

The square root of 13320399 is about 3649.7121804329. The cubic root of 13320399 is about 237.0495187525.

The spelling of 13320399 in words is "thirteen million, three hundred twenty thousand, three hundred ninety-nine".