19082909 has 2 divisors, whose sum is σ = 19082910. Its totient is φ = 19082908.

The previous prime is 19082863. The next prime is 19082911. The reversal of 19082909 is 90928091.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18679684 + 403225 = 4322^2 + 635^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19082909 is a prime.

It is a Sophie Germain prime.

Together with 19082911, it forms a pair of twin primes.

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 (19082929) 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, 9541454 + 9541455.

It is an arithmetic number, because the mean of its divisors is an integer number (9541455).

Almost surely, 2^19082909 is an apocalyptic number.

It is an amenable number.

19082909 is a deficient number, since it is larger than the sum of its proper divisors (1).

19082909 is an equidigital number, since it uses as much as digits as its factorization.

19082909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664, while the sum is 38.

The square root of 19082909 is about 4368.3989057777. The cubic root of 19082909 is about 267.2277324070.

It can be divided in two parts, 19082 and 909, that added together give a palindrome (19991).

The spelling of 19082909 in words is "nineteen million, eighty-two thousand, nine hundred nine".