19128047 has 2 divisors, whose sum is σ = 19128048. Its totient is φ = 19128046.

The previous prime is 19128007. The next prime is 19128049. The reversal of 19128047 is 74082191.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19128047 is a prime.

Together with 19128049, it forms a pair of twin primes.

It is a Chen prime.

It is a plaindrome in base 16.

It is a congruent number.

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

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9564023 + 9564024.

It is an arithmetic number, because the mean of its divisors is an integer number (9564024).

Almost surely, 2^19128047 is an apocalyptic number.

19128047 is a deficient number, since it is larger than the sum of its proper divisors (1).

19128047 is an equidigital number, since it uses as much as digits as its factorization.

19128047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 19128047 is about 4373.5622780521. The cubic root of 19128047 is about 267.4382633316.

The spelling of 19128047 in words is "nineteen million, one hundred twenty-eight thousand, forty-seven".