16835809 has 2 divisors, whose sum is σ = 16835810. Its totient is φ = 16835808.

The previous prime is 16835807. The next prime is 16835857. The reversal of 16835809 is 90853861.

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., 12446784 + 4389025 = 3528^2 + 2095^2 .

It is a cyclic number.

It is not a de Polignac number, because 16835809 - 2¹ = 16835807 is a prime.

Together with 16835807, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (16835801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8417904 + 8417905.

It is an arithmetic number, because the mean of its divisors is an integer number (8417905).

Almost surely, 2^16835809 is an apocalyptic number.

It is an amenable number.

16835809 is a deficient number, since it is larger than the sum of its proper divisors (1).

16835809 is an equidigital number, since it uses as much as digits as its factorization.

16835809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 16835809 is about 4103.1462318567. The cubic root of 16835809 is about 256.2976731449.

The spelling of 16835809 in words is "sixteen million, eight hundred thirty-five thousand, eight hundred nine".