11187993 has 16 divisors (see below), whose sum is σ = 15667200. Its totient is φ = 7092240.

The previous prime is 11187983. The next prime is 11188007. The reversal of 11187993 is 39978111.

It is not a de Polignac number, because 11187993 - 2¹² = 11183897 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11187973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4468 + ... + 6506.

It is an arithmetic number, because the mean of its divisors is an integer number (979200).

Almost surely, 2^11187993 is an apocalyptic number.

It is an amenable number.

11187993 is a deficient number, since it is larger than the sum of its proper divisors (4479207).

11187993 is a wasteful number, since it uses less digits than its factorization.

11187993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2132.

The product of its digits is 13608, while the sum is 39.

The square root of 11187993 is about 3344.8457363532. The cubic root of 11187993 is about 223.6578068629.

The spelling of 11187993 in words is "eleven million, one hundred eighty-seven thousand, nine hundred ninety-three".