11987317 has 4 divisors (see below), whose sum is σ = 12099456. Its totient is φ = 11875180.

The previous prime is 11987299. The next prime is 11987323. The reversal of 11987317 is 71378911.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11987317 - 2¹¹ = 11985269 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 (11987377) 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, 55909 + ... + 56122.

It is an arithmetic number, because the mean of its divisors is an integer number (3024864).

Almost surely, 2^11987317 is an apocalyptic number.

It is an amenable number.

11987317 is a deficient number, since it is larger than the sum of its proper divisors (112139).

11987317 is a wasteful number, since it uses less digits than its factorization.

11987317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112138.

The product of its digits is 10584, while the sum is 37.

The square root of 11987317 is about 3462.2704978092. The cubic root of 11987317 is about 228.8621622403.

It can be divided in two parts, 1198 and 7317, that added together give a triangular number (8515 = T₁₃₀).

The spelling of 11987317 in words is "eleven million, nine hundred eighty-seven thousand, three hundred seventeen".