13111399 has 4 divisors (see below), whose sum is σ = 14984464. Its totient is φ = 11238336.

The previous prime is 13111379. The next prime is 13111409. The reversal of 13111399 is 99311131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13111399 - 2⁵ = 13111367 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 (13111309) 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, 936522 + ... + 936535.

It is an arithmetic number, because the mean of its divisors is an integer number (3746116).

Almost surely, 2^13111399 is an apocalyptic number.

13111399 is a deficient number, since it is larger than the sum of its proper divisors (1873065).

13111399 is an equidigital number, since it uses as much as digits as its factorization.

13111399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1873064.

The product of its digits is 729, while the sum is 28.

The square root of 13111399 is about 3620.9665836624. The cubic root of 13111399 is about 235.8031910378.

The spelling of 13111399 in words is "thirteen million, one hundred eleven thousand, three hundred ninety-nine".