191230199 has 2 divisors, whose sum is σ = 191230200. Its totient is φ = 191230198.

The previous prime is 191230189. The next prime is 191230213. The reversal of 191230199 is 991032191.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 191230199 - 2⁴ = 191230183 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (191230139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95615099 + 95615100.

It is an arithmetic number, because the mean of its divisors is an integer number (95615100).

Almost surely, 2^191230199 is an apocalyptic number.

191230199 is a deficient number, since it is larger than the sum of its proper divisors (1).

191230199 is an equidigital number, since it uses as much as digits as its factorization.

191230199 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4374, while the sum is 35.

The square root of 191230199 is about 13828.6007607422. The cubic root of 191230199 is about 576.1277918218.

The spelling of 191230199 in words is "one hundred ninety-one million, two hundred thirty thousand, one hundred ninety-nine".