16809269 has 2 divisors, whose sum is σ = 16809270. Its totient is φ = 16809268.

The previous prime is 16809263. The next prime is 16809283. The reversal of 16809269 is 96290861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14668900 + 2140369 = 3830^2 + 1463^2 .

It is a cyclic number.

It is not a de Polignac number, because 16809269 - 2⁴ = 16809253 is a prime.

It is a super-2 number, since 2×16809269² = 565103048628722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16809263) 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, 8404634 + 8404635.

It is an arithmetic number, because the mean of its divisors is an integer number (8404635).

Almost surely, 2^16809269 is an apocalyptic number.

It is an amenable number.

16809269 is a deficient number, since it is larger than the sum of its proper divisors (1).

16809269 is an equidigital number, since it uses as much as digits as its factorization.

16809269 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46656, while the sum is 41.

The square root of 16809269 is about 4099.9108526894. The cubic root of 16809269 is about 256.1629262753.

The spelling of 16809269 in words is "sixteen million, eight hundred nine thousand, two hundred sixty-nine".