11187487 has 4 divisors (see below), whose sum is σ = 11322360. Its totient is φ = 11052616.

The previous prime is 11187419. The next prime is 11187503. The reversal of 11187487 is 78478111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78478111 = 101 ⋅777011.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11187487 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 (11188487) 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, 67312 + ... + 67477.

It is an arithmetic number, because the mean of its divisors is an integer number (2830590).

Almost surely, 2^11187487 is an apocalyptic number.

11187487 is a deficient number, since it is larger than the sum of its proper divisors (134873).

11187487 is an equidigital number, since it uses as much as digits as its factorization.

11187487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134872.

The product of its digits is 12544, while the sum is 37.

The square root of 11187487 is about 3344.7700967331. The cubic root of 11187487 is about 223.6544350173.

The spelling of 11187487 in words is "eleven million, one hundred eighty-seven thousand, four hundred eighty-seven".