11138399 has 4 divisors (see below), whose sum is σ = 11205264. Its totient is φ = 11071536.

The previous prime is 11138377. The next prime is 11138423. The reversal of 11138399 is 99383111.

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 11138399 - 2⁸ = 11138143 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 (11138359) 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, 33182 + ... + 33515.

It is an arithmetic number, because the mean of its divisors is an integer number (2801316).

Almost surely, 2^11138399 is an apocalyptic number.

11138399 is a deficient number, since it is larger than the sum of its proper divisors (66865).

11138399 is an equidigital number, since it uses as much as digits as its factorization.

11138399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66864.

The product of its digits is 5832, while the sum is 35.

The square root of 11138399 is about 3337.4240066255. The cubic root of 11138399 is about 223.3268414736.

The spelling of 11138399 in words is "eleven million, one hundred thirty-eight thousand, three hundred ninety-nine".