11399 has 2 divisors, whose sum is σ = 11400. Its totient is φ = 11398.

The previous prime is 11393. The next prime is 11411. The reversal of 11399 is 99311.

11399 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 a cyclic number.

It is not a de Polignac number, because 11399 - 2⁴ = 11383 is a prime.

It is a Chen prime.

It is a plaindrome in base 10 and base 15.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5699 + 5700.

It is an arithmetic number, because the mean of its divisors is an integer number (5700).

2¹¹³⁹⁹ is an apocalyptic number.

11399 is a deficient number, since it is larger than the sum of its proper divisors (1).

11399 is an equidigital number, since it uses as much as digits as its factorization.

11399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 243, while the sum is 23.

The square root of 11399 is about 106.7660994886. The cubic root of 11399 is about 22.5055130523.

It can be divided in two parts, 113 and 99, that added together give a palindrome (212).

The spelling of 11399 in words is "eleven thousand, three hundred ninety-nine".