16809739 has 2 divisors, whose sum is σ = 16809740. Its totient is φ = 16809738.

The previous prime is 16809679. The next prime is 16809769. The reversal of 16809739 is 93790861.

It is a strong prime.

It is an emirp because it is prime and its reverse (93790861) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16809739 - 2¹⁵ = 16776971 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16809695 and 16809704.

It is not a weakly prime, because it can be changed into another prime (16809769) 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, 8404869 + 8404870.

It is an arithmetic number, because the mean of its divisors is an integer number (8404870).

Almost surely, 2^16809739 is an apocalyptic number.

16809739 is a deficient number, since it is larger than the sum of its proper divisors (1).

16809739 is an equidigital number, since it uses as much as digits as its factorization.

16809739 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81648, while the sum is 43.

The square root of 16809739 is about 4099.9681706082. The cubic root of 16809739 is about 256.1653137568.

The spelling of 16809739 in words is "sixteen million, eight hundred nine thousand, seven hundred thirty-nine".