11627821 has 4 divisors (see below), whose sum is σ = 12002944. Its totient is φ = 11252700.

The previous prime is 11627801. The next prime is 11627831. The reversal of 11627821 is 12872611.

11627821 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11627821 - 2⁵ = 11627789 is a prime.

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 11627821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11627801) 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, 187515 + ... + 187576.

It is an arithmetic number, because the mean of its divisors is an integer number (3000736).

Almost surely, 2^11627821 is an apocalyptic number.

It is an amenable number.

11627821 is a deficient number, since it is larger than the sum of its proper divisors (375123).

11627821 is an equidigital number, since it uses as much as digits as its factorization.

11627821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375122.

The product of its digits is 1344, while the sum is 28.

The square root of 11627821 is about 3409.9590906637. The cubic root of 11627821 is about 226.5510673042.

The spelling of 11627821 in words is "eleven million, six hundred twenty-seven thousand, eight hundred twenty-one".