199134427 has 2 divisors, whose sum is σ = 199134428. Its totient is φ = 199134426.

The previous prime is 199134401. The next prime is 199134443. The reversal of 199134427 is 724431991.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 199134427 - 2²⁷ = 64916699 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 199134427.

It is not a weakly prime, because it can be changed into another prime (199134487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99567213 + 99567214.

It is an arithmetic number, because the mean of its divisors is an integer number (99567214).

Almost surely, 2^199134427 is an apocalyptic number.

199134427 is a deficient number, since it is larger than the sum of its proper divisors (1).

199134427 is an equidigital number, since it uses as much as digits as its factorization.

199134427 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432, while the sum is 40.

The square root of 199134427 is about 14111.4998139815. The cubic root of 199134427 is about 583.9586773711.

The spelling of 199134427 in words is "one hundred ninety-nine million, one hundred thirty-four thousand, four hundred twenty-seven".