19055609 has 2 divisors, whose sum is σ = 19055610. Its totient is φ = 19055608.

The previous prime is 19055599. The next prime is 19055627. The reversal of 19055609 is 90655091.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17682025 + 1373584 = 4205^2 + 1172^2 .

It is an emirp because it is prime and its reverse (90655091) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19055609 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (19055009) 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, 9527804 + 9527805.

It is an arithmetic number, because the mean of its divisors is an integer number (9527805).

Almost surely, 2^19055609 is an apocalyptic number.

It is an amenable number.

19055609 is a deficient number, since it is larger than the sum of its proper divisors (1).

19055609 is an equidigital number, since it uses as much as digits as its factorization.

19055609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12150, while the sum is 35.

The square root of 19055609 is about 4365.2730727871. The cubic root of 19055609 is about 267.1002396375.

The spelling of 19055609 in words is "nineteen million, fifty-five thousand, six hundred nine".