11894681 has 4 divisors (see below), whose sum is σ = 11902500. Its totient is φ = 11886864.

The previous prime is 11894677. The next prime is 11894683. The reversal of 11894681 is 18649811.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 18649811 = 19 ⋅981569.

It can be written as a sum of positive squares in 2 ways, for example, as 839056 + 11055625 = 916^2 + 3325^2 .

It is a cyclic number.

It is not a de Polignac number, because 11894681 - 2² = 11894677 is a prime.

It is a super-2 number, since 2×11894681² = 282966872183522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11894683) 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, 806 + ... + 4943.

It is an arithmetic number, because the mean of its divisors is an integer number (2975625).

Almost surely, 2^11894681 is an apocalyptic number.

It is an amenable number.

11894681 is a deficient number, since it is larger than the sum of its proper divisors (7819).

11894681 is an equidigital number, since it uses as much as digits as its factorization.

11894681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7818.

The product of its digits is 13824, while the sum is 38.

The square root of 11894681 is about 3448.8666254293. The cubic root of 11894681 is about 228.2711007814.

The spelling of 11894681 in words is "eleven million, eight hundred ninety-four thousand, six hundred eighty-one".