11321647 has 4 divisors (see below), whose sum is σ = 11330280. Its totient is φ = 11313016.

The previous prime is 11321591. The next prime is 11321659. The reversal of 11321647 is 74612311.

11321647 is digitally balanced in base 2 and base 3, because in such bases 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 a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 74612311 = 263 ⋅283697.

It is a cyclic number.

It is not a de Polignac number, because 11321647 - 2¹⁹ = 10797359 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11321047) 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, 1897 + ... + 5122.

It is an arithmetic number, because the mean of its divisors is an integer number (2832570).

Almost surely, 2^11321647 is an apocalyptic number.

11321647 is a deficient number, since it is larger than the sum of its proper divisors (8633).

11321647 is an equidigital number, since it uses as much as digits as its factorization.

11321647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8632.

The product of its digits is 1008, while the sum is 25.

The square root of 11321647 is about 3364.7655193193. The cubic root of 11321647 is about 224.5449039895.

Adding to 11321647 its reverse (74612311), we get a palindrome (85933958).

The spelling of 11321647 in words is "eleven million, three hundred twenty-one thousand, six hundred forty-seven".