11387 has 4 divisors (see below), whose sum is σ = 11640. Its totient is φ = 11136.

The previous prime is 11383. The next prime is 11393. The reversal of 11387 is 78311.

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 11387 - 2² = 11383 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11383) 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, 38 + ... + 155.

It is an arithmetic number, because the mean of its divisors is an integer number (2910).

2¹¹³⁸⁷ is an apocalyptic number.

11387 is a deficient number, since it is larger than the sum of its proper divisors (253).

11387 is an equidigital number, since it uses as much as digits as its factorization.

11387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252.

The product of its digits is 168, while the sum is 20.

The square root of 11387 is about 106.7098870771. The cubic root of 11387 is about 22.4976129155.

Adding to 11387 its reverse (78311), we get a palindrome (89698).

The spelling of 11387 in words is "eleven thousand, three hundred eighty-seven".