11311447 has 4 divisors (see below), whose sum is σ = 12927376. Its totient is φ = 9695520.

The previous prime is 11311397. The next prime is 11311453. The reversal of 11311447 is 74411311.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11311447 - 2⁷ = 11311319 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11311747) 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, 807954 + ... + 807967.

It is an arithmetic number, because the mean of its divisors is an integer number (3231844).

Almost surely, 2^11311447 is an apocalyptic number.

11311447 is a deficient number, since it is larger than the sum of its proper divisors (1615929).

11311447 is an equidigital number, since it uses as much as digits as its factorization.

11311447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1615928.

The product of its digits is 336, while the sum is 22.

The square root of 11311447 is about 3363.2494703783. The cubic root of 11311447 is about 224.4774507240.

Adding to 11311447 its reverse (74411311), we get a palindrome (85722758).

The spelling of 11311447 in words is "eleven million, three hundred eleven thousand, four hundred forty-seven".