19228697 has 4 divisors (see below), whose sum is σ = 19675920. Its totient is φ = 18781476.

The previous prime is 19228673. The next prime is 19228721. The reversal of 19228697 is 79682291.

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, and also an emirpimes, since its reverse is a distinct semiprime: 79682291 = 13 ⋅6129407.

It is an interprime number because it is at equal distance from previous prime (19228673) and next prime (19228721).

It is a cyclic number.

It is not a de Polignac number, because 19228697 - 2⁸ = 19228441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19228637) 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, 223547 + ... + 223632.

It is an arithmetic number, because the mean of its divisors is an integer number (4918980).

Almost surely, 2^19228697 is an apocalyptic number.

It is an amenable number.

19228697 is a deficient number, since it is larger than the sum of its proper divisors (447223).

19228697 is an equidigital number, since it uses as much as digits as its factorization.

19228697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 447222.

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

The square root of 19228697 is about 4385.0538195101. The cubic root of 19228697 is about 267.9065213822.

The spelling of 19228697 in words is "nineteen million, two hundred twenty-eight thousand, six hundred ninety-seven".