11811399 has 16 divisors (see below), whose sum is σ = 16355808. Its totient is φ = 7575552.

The previous prime is 11811391. The next prime is 11811419. The reversal of 11811399 is 99311811.

It is a happy number.

11811399 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11811399 - 2³ = 11811391 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11811391) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10219 + ... + 11315.

It is an arithmetic number, because the mean of its divisors is an integer number (1022238).

Almost surely, 2^11811399 is an apocalyptic number.

11811399 is a deficient number, since it is larger than the sum of its proper divisors (4544409).

11811399 is a wasteful number, since it uses less digits than its factorization.

11811399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1234.

The product of its digits is 1944, while the sum is 33.

The square root of 11811399 is about 3436.7715955530. The cubic root of 11811399 is about 227.7370969365.

The spelling of 11811399 in words is "eleven million, eight hundred eleven thousand, three hundred ninety-nine".