16806869 has 2 divisors, whose sum is σ = 16806870. Its totient is φ = 16806868.

The previous prime is 16806833. The next prime is 16806877. The reversal of 16806869 is 96860861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10804369 + 6002500 = 3287^2 + 2450^2 .

It is a cyclic number.

It is not a de Polignac number, because 16806869 - 2²⁰ = 15758293 is a prime.

It is a super-2 number, since 2×16806869² = 564941691166322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16806809) 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, 8403434 + 8403435.

It is an arithmetic number, because the mean of its divisors is an integer number (8403435).

Almost surely, 2^16806869 is an apocalyptic number.

It is an amenable number.

16806869 is a deficient number, since it is larger than the sum of its proper divisors (1).

16806869 is an equidigital number, since it uses as much as digits as its factorization.

16806869 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 124416, while the sum is 44.

The square root of 16806869 is about 4099.6181529503. The cubic root of 16806869 is about 256.1507341868.

The spelling of 16806869 in words is "sixteen million, eight hundred six thousand, eight hundred sixty-nine".