11387147 has 4 divisors (see below), whose sum is σ = 11406696. Its totient is φ = 11367600.

The previous prime is 11387143. The next prime is 11387171. The reversal of 11387147 is 74178311.

It is a happy number.

11387147 is digitally balanced in base 3, 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, and also an emirpimes, since its reverse is a distinct semiprime: 74178311 = 43 ⋅1725077.

It is a cyclic number.

It is not a de Polignac number, because 11387147 - 2² = 11387143 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11387143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8873 + ... + 10074.

It is an arithmetic number, because the mean of its divisors is an integer number (2851674).

Almost surely, 2^11387147 is an apocalyptic number.

11387147 is a deficient number, since it is larger than the sum of its proper divisors (19549).

11387147 is an equidigital number, since it uses as much as digits as its factorization.

11387147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19548.

The product of its digits is 4704, while the sum is 32.

The square root of 11387147 is about 3374.4847014026. The cubic root of 11387147 is about 224.9770972573.

The spelling of 11387147 in words is "eleven million, three hundred eighty-seven thousand, one hundred forty-seven".