16644233 has 2 divisors, whose sum is σ = 16644234. Its totient is φ = 16644232.

The previous prime is 16644227. The next prime is 16644253. The reversal of 16644233 is 33244661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14235529 + 2408704 = 3773^2 + 1552^2 .

It is a cyclic number.

It is not a de Polignac number, because 16644233 - 2⁶ = 16644169 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16644196 and 16644205.

It is not a weakly prime, because it can be changed into another prime (16644223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8322116 + 8322117.

It is an arithmetic number, because the mean of its divisors is an integer number (8322117).

Almost surely, 2^16644233 is an apocalyptic number.

It is an amenable number.

16644233 is a deficient number, since it is larger than the sum of its proper divisors (1).

16644233 is an equidigital number, since it uses as much as digits as its factorization.

16644233 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 29.

The square root of 16644233 is about 4079.7344276313. The cubic root of 16644233 is about 255.3218184689.

Adding to 16644233 its reverse (33244661), we get a palindrome (49888894).

The spelling of 16644233 in words is "sixteen million, six hundred forty-four thousand, two hundred thirty-three".