19128089 has 2 divisors, whose sum is σ = 19128090. Its totient is φ = 19128088.

The previous prime is 19128049. The next prime is 19128103. The reversal of 19128089 is 98082191.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13801225 + 5326864 = 3715^2 + 2308^2 .

It is an emirp because it is prime and its reverse (98082191) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19128089 - 2⁸ = 19127833 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (19128049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9564044 + 9564045.

It is an arithmetic number, because the mean of its divisors is an integer number (9564045).

Almost surely, 2^19128089 is an apocalyptic number.

It is an amenable number.

19128089 is a deficient number, since it is larger than the sum of its proper divisors (1).

19128089 is an equidigital number, since it uses as much as digits as its factorization.

19128089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 38.

The square root of 19128089 is about 4373.5670796273. The cubic root of 19128089 is about 267.4384590721.

It can be divided in two parts, 1912 and 8089, that added together give a palindrome (10001).

The spelling of 19128089 in words is "nineteen million, one hundred twenty-eight thousand, eighty-nine".