11497681 has 4 divisors (see below), whose sum is σ = 12382132. Its totient is φ = 10613232.

The previous prime is 11497667. The next prime is 11497687. The reversal of 11497681 is 18679411.

11497681 is digitally balanced in base 3, 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.

It can be written as a sum of positive squares in 2 ways, for example, as 2250000 + 9247681 = 1500^2 + 3041^2 .

It is a cyclic number.

It is not a de Polignac number, because 11497681 - 2⁵ = 11497649 is a prime.

It is a super-2 number, since 2×11497681² = 264393336755522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11497681.

It is not an unprimeable number, because it can be changed into a prime (11497687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 442206 + ... + 442231.

It is an arithmetic number, because the mean of its divisors is an integer number (3095533).

Almost surely, 2^11497681 is an apocalyptic number.

It is an amenable number.

11497681 is a deficient number, since it is larger than the sum of its proper divisors (884451).

11497681 is an equidigital number, since it uses as much as digits as its factorization.

11497681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 884450.

The product of its digits is 12096, while the sum is 37.

The square root of 11497681 is about 3390.8230564275. The cubic root of 11497681 is about 225.7026985872.

The spelling of 11497681 in words is "eleven million, four hundred ninety-seven thousand, six hundred eighty-one".