19135189 has 2 divisors, whose sum is σ = 19135190. Its totient is φ = 19135188.

The previous prime is 19135187. The next prime is 19135199. The reversal of 19135189 is 98153191.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17222500 + 1912689 = 4150^2 + 1383^2 .

It is a cyclic number.

It is not a de Polignac number, because 19135189 - 2¹ = 19135187 is a prime.

Together with 19135187, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19135187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9567594 + 9567595.

It is an arithmetic number, because the mean of its divisors is an integer number (9567595).

Almost surely, 2^19135189 is an apocalyptic number.

It is an amenable number.

19135189 is a deficient number, since it is larger than the sum of its proper divisors (1).

19135189 is an equidigital number, since it uses as much as digits as its factorization.

19135189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9720, while the sum is 37.

The square root of 19135189 is about 4374.3786987411. The cubic root of 19135189 is about 267.4715444154.

The spelling of 19135189 in words is "nineteen million, one hundred thirty-five thousand, one hundred eighty-nine".