19072189 has 2 divisors, whose sum is σ = 19072190. Its totient is φ = 19072188.

The previous prime is 19072187. The next prime is 19072211. The reversal of 19072189 is 98127091.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18207289 + 864900 = 4267^2 + 930^2 .

It is a cyclic number.

It is not a de Polignac number, because 19072189 - 2¹ = 19072187 is a prime.

Together with 19072187, 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 (19072187) 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, 9536094 + 9536095.

It is an arithmetic number, because the mean of its divisors is an integer number (9536095).

Almost surely, 2^19072189 is an apocalyptic number.

It is an amenable number.

19072189 is a deficient number, since it is larger than the sum of its proper divisors (1).

19072189 is an equidigital number, since it uses as much as digits as its factorization.

19072189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 37.

The square root of 19072189 is about 4367.1717392381. The cubic root of 19072189 is about 267.1776838203.

It can be divided in two parts, 1907 and 2189, that added together give a 12-th power (4096 = 2¹²).

The spelling of 19072189 in words is "nineteen million, seventy-two thousand, one hundred eighty-nine".