19394227 has 2 divisors, whose sum is σ = 19394228. Its totient is φ = 19394226.

The previous prime is 19394213. The next prime is 19394233. The reversal of 19394227 is 72249391.

It is a strong prime.

It is an emirp because it is prime and its reverse (72249391) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19394227 - 2⁷ = 19394099 is a prime.

It is a super-2 number, since 2×19394227² = 752272081855058, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (19394027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9697113 + 9697114.

It is an arithmetic number, because the mean of its divisors is an integer number (9697114).

Almost surely, 2^19394227 is an apocalyptic number.

19394227 is a deficient number, since it is larger than the sum of its proper divisors (1).

19394227 is an equidigital number, since it uses as much as digits as its factorization.

19394227 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27216, while the sum is 37.

The square root of 19394227 is about 4403.8877142816. The cubic root of 19394227 is about 268.6730825851.

The spelling of 19394227 in words is "nineteen million, three hundred ninety-four thousand, two hundred twenty-seven".