11387605 has 4 divisors (see below), whose sum is σ = 13665132. Its totient is φ = 9110080.

The previous prime is 11387573. The next prime is 11387609. The reversal of 11387605 is 50678311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50678311 = 223 ⋅227257.

It can be written as a sum of positive squares in 2 ways, for example, as 5424241 + 5963364 = 2329^2 + 2442^2 .

It is not a de Polignac number, because 11387605 - 2⁵ = 11387573 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11387609) 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, 1138756 + ... + 1138765.

It is an arithmetic number, because the mean of its divisors is an integer number (3416283).

Almost surely, 2^11387605 is an apocalyptic number.

It is an amenable number.

11387605 is a deficient number, since it is larger than the sum of its proper divisors (2277527).

11387605 is an equidigital number, since it uses as much as digits as its factorization.

11387605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2277526.

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 11387605 is about 3374.5525629333. The cubic root of 11387605 is about 224.9801134687.

The spelling of 11387605 in words is "eleven million, three hundred eighty-seven thousand, six hundred five".