11143887 has 4 divisors (see below), whose sum is σ = 14858520. Its totient is φ = 7429256.

The previous prime is 11143883. The next prime is 11143889. The reversal of 11143887 is 78834111.

11143887 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 a cyclic number.

It is not a de Polignac number, because 11143887 - 2² = 11143883 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11143883) 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, 1857312 + ... + 1857317.

It is an arithmetic number, because the mean of its divisors is an integer number (3714630).

Almost surely, 2^11143887 is an apocalyptic number.

11143887 is a deficient number, since it is larger than the sum of its proper divisors (3714633).

11143887 is an equidigital number, since it uses as much as digits as its factorization.

11143887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3714632.

The product of its digits is 5376, while the sum is 33.

The square root of 11143887 is about 3338.2460963806. The cubic root of 11143887 is about 223.3635139035.

Adding to 11143887 its reverse (78834111), we get a palindrome (89977998).

The spelling of 11143887 in words is "eleven million, one hundred forty-three thousand, eight hundred eighty-seven".