11918317 has 4 divisors (see below), whose sum is σ = 11954656. Its totient is φ = 11881980.

The previous prime is 11918311. The next prime is 11918321. The reversal of 11918317 is 71381911.

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 11918317 - 2⁷ = 11918189 is a prime.

It is a super-2 number, since 2×11918317² = 284092560224978, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11918311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17673 + ... + 18334.

It is an arithmetic number, because the mean of its divisors is an integer number (2988664).

Almost surely, 2^11918317 is an apocalyptic number.

It is an amenable number.

11918317 is a deficient number, since it is larger than the sum of its proper divisors (36339).

11918317 is an equidigital number, since it uses as much as digits as its factorization.

11918317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36338.

The product of its digits is 1512, while the sum is 31.

The square root of 11918317 is about 3452.2915577917. The cubic root of 11918317 is about 228.4222004178.

The spelling of 11918317 in words is "eleven million, nine hundred eighteen thousand, three hundred seventeen".