19170089 has 2 divisors, whose sum is σ = 19170090. Its totient is φ = 19170088.

The previous prime is 19170079. The next prime is 19170091. The reversal of 19170089 is 98007191.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11971600 + 7198489 = 3460^2 + 2683^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19170089 is a prime.

It is a Sophie Germain prime.

Together with 19170091, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (19170029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9585044 + 9585045.

It is an arithmetic number, because the mean of its divisors is an integer number (9585045).

Almost surely, 2^19170089 is an apocalyptic number.

It is an amenable number.

19170089 is a deficient number, since it is larger than the sum of its proper divisors (1).

19170089 is an equidigital number, since it uses as much as digits as its factorization.

19170089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 35.

The square root of 19170089 is about 4378.3660194187. The cubic root of 19170089 is about 267.6340563114.

The spelling of 19170089 in words is "nineteen million, one hundred seventy thousand, eighty-nine".