16644349 has 2 divisors, whose sum is σ = 16644350. Its totient is φ = 16644348.

The previous prime is 16644337. The next prime is 16644367. The reversal of 16644349 is 94344661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11088900 + 5555449 = 3330^2 + 2357^2 .

It is an emirp because it is prime and its reverse (94344661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16644349 - 2¹³ = 16636157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16644049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8322174 + 8322175.

It is an arithmetic number, because the mean of its divisors is an integer number (8322175).

Almost surely, 2^16644349 is an apocalyptic number.

It is an amenable number.

16644349 is a deficient number, since it is larger than the sum of its proper divisors (1).

16644349 is an equidigital number, since it uses as much as digits as its factorization.

16644349 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62208, while the sum is 37.

The square root of 16644349 is about 4079.7486442182. The cubic root of 16644349 is about 255.3224116125.

The spelling of 16644349 in words is "sixteen million, six hundred forty-four thousand, three hundred forty-nine".