16748909 has 2 divisors, whose sum is σ = 16748910. Its totient is φ = 16748908.

The previous prime is 16748903. The next prime is 16748911. The reversal of 16748909 is 90984761.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16362025 + 386884 = 4045^2 + 622^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16748909 is a prime.

It is a Sophie Germain prime.

Together with 16748911, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 16748909.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16748903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8374454 + 8374455.

It is an arithmetic number, because the mean of its divisors is an integer number (8374455).

Almost surely, 2^16748909 is an apocalyptic number.

It is an amenable number.

16748909 is a deficient number, since it is larger than the sum of its proper divisors (1).

16748909 is an equidigital number, since it uses as much as digits as its factorization.

16748909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 16748909 is about 4092.5430969020. The cubic root of 16748909 is about 255.8559421027.

The spelling of 16748909 in words is "sixteen million, seven hundred forty-eight thousand, nine hundred nine".