19112897 has 4 divisors (see below), whose sum is σ = 19189296. Its totient is φ = 19036500.

The previous prime is 19112843. The next prime is 19112903. The reversal of 19112897 is 79821191.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 19112897 - 2¹⁴ = 19096513 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 19112897.

It is not an unprimeable number, because it can be changed into a prime (19112497) 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 in 3 ways as a sum of consecutive naturals, for example, 37823 + ... + 38324.

It is an arithmetic number, because the mean of its divisors is an integer number (4797324).

Almost surely, 2^19112897 is an apocalyptic number.

It is an amenable number.

19112897 is a deficient number, since it is larger than the sum of its proper divisors (76399).

19112897 is an equidigital number, since it uses as much as digits as its factorization.

19112897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76398.

The product of its digits is 9072, while the sum is 38.

The square root of 19112897 is about 4371.8299372231. The cubic root of 19112897 is about 267.3676382464.

The spelling of 19112897 in words is "nineteen million, one hundred twelve thousand, eight hundred ninety-seven".