11638321 has 2 divisors, whose sum is σ = 11638322. Its totient is φ = 11638320.

The previous prime is 11638303. The next prime is 11638339. The reversal of 11638321 is 12383611.

It is a balanced prime because it is at equal distance from previous prime (11638303) and next prime (11638339).

It can be written as a sum of positive squares in only one way, i.e., 9678321 + 1960000 = 3111^2 + 1400^2 .

It is a cyclic number.

It is not a de Polignac number, because 11638321 - 2¹⁵ = 11605553 is a prime.

It is not a weakly prime, because it can be changed into another prime (11638721) 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, 5819160 + 5819161.

It is an arithmetic number, because the mean of its divisors is an integer number (5819161).

Almost surely, 2^11638321 is an apocalyptic number.

It is an amenable number.

11638321 is a deficient number, since it is larger than the sum of its proper divisors (1).

11638321 is an equidigital number, since it uses as much as digits as its factorization.

11638321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 864, while the sum is 25.

The square root of 11638321 is about 3411.4983511648. The cubic root of 11638321 is about 226.6192391639.

The spelling of 11638321 in words is "eleven million, six hundred thirty-eight thousand, three hundred twenty-one".