11317681 has 4 divisors (see below), whose sum is σ = 11593764. Its totient is φ = 11041600.

The previous prime is 11317667. The next prime is 11317703. The reversal of 11317681 is 18671311.

11317681 is digitally balanced in base 2, 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: 18671311 = 179 ⋅104309.

It can be written as a sum of positive squares in 2 ways, for example, as 4661281 + 6656400 = 2159^2 + 2580^2 .

It is a cyclic number.

It is not a de Polignac number, because 11317681 - 2⁹ = 11317169 is a prime.

It is a super-2 number, since 2×11317681² = 256179806435522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11317651) 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, 137980 + ... + 138061.

It is an arithmetic number, because the mean of its divisors is an integer number (2898441).

Almost surely, 2^11317681 is an apocalyptic number.

It is an amenable number.

11317681 is a deficient number, since it is larger than the sum of its proper divisors (276083).

11317681 is an equidigital number, since it uses as much as digits as its factorization.

11317681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276082.

The product of its digits is 1008, while the sum is 28.

The square root of 11317681 is about 3364.1761249970. The cubic root of 11317681 is about 224.5186813885.

Adding to 11317681 its reverse (18671311), we get a palindrome (29988992).

The spelling of 11317681 in words is "eleven million, three hundred seventeen thousand, six hundred eighty-one".