19226897 has 4 divisors (see below), whose sum is σ = 19365360. Its totient is φ = 19088436.

The previous prime is 19226869. The next prime is 19226947. The reversal of 19226897 is 79862291.

It is a happy number.

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 19226897 - 2¹⁰ = 19225873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19226197) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69023 + ... + 69300.

It is an arithmetic number, because the mean of its divisors is an integer number (4841340).

Almost surely, 2^19226897 is an apocalyptic number.

It is an amenable number.

19226897 is a deficient number, since it is larger than the sum of its proper divisors (138463).

19226897 is a wasteful number, since it uses less digits than its factorization.

19226897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138462.

The product of its digits is 108864, while the sum is 44.

The square root of 19226897 is about 4384.8485720718. The cubic root of 19226897 is about 267.8981615371.

The spelling of 19226897 in words is "nineteen million, two hundred twenty-six thousand, eight hundred ninety-seven".