11195987 has 4 divisors (see below), whose sum is σ = 12213816. Its totient is φ = 10178160.

The previous prime is 11195971. The next prime is 11195999. The reversal of 11195987 is 78959111.

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 11195987 - 2⁴ = 11195971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11195957) 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 3 ways as a sum of consecutive naturals, for example, 508898 + ... + 508919.

It is an arithmetic number, because the mean of its divisors is an integer number (3053454).

Almost surely, 2^11195987 is an apocalyptic number.

11195987 is a deficient number, since it is larger than the sum of its proper divisors (1017829).

11195987 is a wasteful number, since it uses less digits than its factorization.

11195987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1017828.

The product of its digits is 22680, while the sum is 41.

The square root of 11195987 is about 3346.0404958697. The cubic root of 11195987 is about 223.7110632079.

The spelling of 11195987 in words is "eleven million, one hundred ninety-five thousand, nine hundred eighty-seven".