19196209 has 2 divisors, whose sum is σ = 19196210. Its totient is φ = 19196208.

The previous prime is 19196207. The next prime is 19196227. The reversal of 19196209 is 90269191.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16483600 + 2712609 = 4060^2 + 1647^2 .

It is a cyclic number.

It is not a de Polignac number, because 19196209 - 2¹ = 19196207 is a prime.

Together with 19196207, it forms a pair of twin primes.

It is a Chen prime.

It is a plaindrome in base 14.

It is not a weakly prime, because it can be changed into another prime (19196201) 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, 9598104 + 9598105.

It is an arithmetic number, because the mean of its divisors is an integer number (9598105).

Almost surely, 2^19196209 is an apocalyptic number.

It is an amenable number.

19196209 is a deficient number, since it is larger than the sum of its proper divisors (1).

19196209 is an equidigital number, since it uses as much as digits as its factorization.

19196209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8748, while the sum is 37.

The square root of 19196209 is about 4381.3478519743. The cubic root of 19196209 is about 267.7555551206.

It can be divided in two parts, 1919 and 6209, that added together give a triangular number (8128 = T₁₂₇).

The spelling of 19196209 in words is "nineteen million, one hundred ninety-six thousand, two hundred nine".