11628821 has 2 divisors, whose sum is σ = 11628822. Its totient is φ = 11628820.

The previous prime is 11628809. The next prime is 11628847. The reversal of 11628821 is 12882611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8439025 + 3189796 = 2905^2 + 1786^2 .

It is a cyclic number.

It is not a de Polignac number, because 11628821 - 2¹⁴ = 11612437 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11628121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5814410 + 5814411.

It is an arithmetic number, because the mean of its divisors is an integer number (5814411).

Almost surely, 2^11628821 is an apocalyptic number.

It is an amenable number.

11628821 is a deficient number, since it is larger than the sum of its proper divisors (1).

11628821 is an equidigital number, since it uses as much as digits as its factorization.

11628821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1536, while the sum is 29.

The square root of 11628821 is about 3410.1057168364. The cubic root of 11628821 is about 226.5575616300.

The spelling of 11628821 in words is "eleven million, six hundred twenty-eight thousand, eight hundred twenty-one".