19057009 has 2 divisors, whose sum is σ = 19057010. Its totient is φ = 19057008.

The previous prime is 19057007. The next prime is 19057037. The reversal of 19057009 is 90075091.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18490000 + 567009 = 4300^2 + 753^2 .

It is an emirp because it is prime and its reverse (90075091) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19057009 - 2¹ = 19057007 is a prime.

Together with 19057007, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (19057007) 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, 9528504 + 9528505.

It is an arithmetic number, because the mean of its divisors is an integer number (9528505).

Almost surely, 2^19057009 is an apocalyptic number.

It is an amenable number.

19057009 is a deficient number, since it is larger than the sum of its proper divisors (1).

19057009 is an equidigital number, since it uses as much as digits as its factorization.

19057009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2835, while the sum is 31.

The square root of 19057009 is about 4365.4334263622. The cubic root of 19057009 is about 267.1067806893.

The spelling of 19057009 in words is "nineteen million, fifty-seven thousand, nine".