16982321 has 2 divisors, whose sum is σ = 16982322. Its totient is φ = 16982320.

The previous prime is 16982311. The next prime is 16982341. The reversal of 16982321 is 12328961.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16974400 + 7921 = 4120^2 + 89^2 .

It is a cyclic number.

It is not a de Polignac number, because 16982321 - 2¹⁸ = 16720177 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (16982311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8491160 + 8491161.

It is an arithmetic number, because the mean of its divisors is an integer number (8491161).

Almost surely, 2^16982321 is an apocalyptic number.

It is an amenable number.

16982321 is a deficient number, since it is larger than the sum of its proper divisors (1).

16982321 is an equidigital number, since it uses as much as digits as its factorization.

16982321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 32.

The square root of 16982321 is about 4120.9611742893. The cubic root of 16982321 is about 257.0389954303.

The spelling of 16982321 in words is "sixteen million, nine hundred eighty-two thousand, three hundred twenty-one".