16804649 has 2 divisors, whose sum is σ = 16804650. Its totient is φ = 16804648.

The previous prime is 16804633. The next prime is 16804661. The reversal of 16804649 is 94640861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14115049 + 2689600 = 3757^2 + 1640^2 .

It is a cyclic number.

It is not a de Polignac number, because 16804649 - 2⁴ = 16804633 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (16804609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8402324 + 8402325.

It is an arithmetic number, because the mean of its divisors is an integer number (8402325).

Almost surely, 2^16804649 is an apocalyptic number.

It is an amenable number.

16804649 is a deficient number, since it is larger than the sum of its proper divisors (1).

16804649 is an equidigital number, since it uses as much as digits as its factorization.

16804649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 16804649 is about 4099.3473870849. The cubic root of 16804649 is about 256.1394554716.

The spelling of 16804649 in words is "sixteen million, eight hundred four thousand, six hundred forty-nine".