16728769 has 2 divisors, whose sum is σ = 16728770. Its totient is φ = 16728768.

The previous prime is 16728749. The next prime is 16728793. The reversal of 16728769 is 96782761.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16646400 + 82369 = 4080^2 + 287^2 .

It is an emirp because it is prime and its reverse (96782761) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16728769 - 2²³ = 8340161 is a prime.

It is a super-2 number, since 2×16728769² = 559703424510722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (16728709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8364384 + 8364385.

It is an arithmetic number, because the mean of its divisors is an integer number (8364385).

Almost surely, 2^16728769 is an apocalyptic number.

It is an amenable number.

16728769 is a deficient number, since it is larger than the sum of its proper divisors (1).

16728769 is an equidigital number, since it uses as much as digits as its factorization.

16728769 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 254016, while the sum is 46.

The square root of 16728769 is about 4090.0817840234. The cubic root of 16728769 is about 255.7533482469.

The spelling of 16728769 in words is "sixteen million, seven hundred twenty-eight thousand, seven hundred sixty-nine".