11447681 has 8 divisors (see below), whose sum is σ = 13852800. Its totient is φ = 9235008.

The previous prime is 11447677. The next prime is 11447693. The reversal of 11447681 is 18674411.

11447681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11447681 - 2² = 11447677 is a prime.

It is a super-2 number, since 2×11447681² = 262098800555522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11447281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47981 + ... + 48218.

It is an arithmetic number, because the mean of its divisors is an integer number (1731600).

Almost surely, 2^11447681 is an apocalyptic number.

It is an amenable number.

11447681 is a deficient number, since it is larger than the sum of its proper divisors (2405119).

11447681 is an equidigital number, since it uses as much as digits as its factorization.

11447681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96223.

The product of its digits is 5376, while the sum is 32.

The square root of 11447681 is about 3383.4421821571. The cubic root of 11447681 is about 225.3750518461.

The spelling of 11447681 in words is "eleven million, four hundred forty-seven thousand, six hundred eighty-one".