11569987 has 8 divisors (see below), whose sum is σ = 13592880. Its totient is φ = 9708960.

The previous prime is 11569981. The next prime is 11569991. The reversal of 11569987 is 78996511.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11569987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11569981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40312 + ... + 40597.

It is an arithmetic number, because the mean of its divisors is an integer number (1699110).

Almost surely, 2^11569987 is an apocalyptic number.

11569987 is a deficient number, since it is larger than the sum of its proper divisors (2022893).

11569987 is a wasteful number, since it uses less digits than its factorization.

11569987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80933.

The product of its digits is 136080, while the sum is 46.

The square root of 11569987 is about 3401.4683594001. The cubic root of 11569987 is about 226.1748392528.

The spelling of 11569987 in words is "eleven million, five hundred sixty-nine thousand, nine hundred eighty-seven".