199194194 has 4 divisors (see below), whose sum is σ = 298791294. Its totient is φ = 99597096.

The previous prime is 199194179. The next prime is 199194197. The reversal of 199194194 is 491491991.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 166281025 + 32913169 = 12895^2 + 5737^2 .

It is not an unprimeable number, because it can be changed into a prime (199194197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49798547 + ... + 49798550.

Almost surely, 2^199194194 is an apocalyptic number.

199194194 is a deficient number, since it is larger than the sum of its proper divisors (99597100).

199194194 is an equidigital number, since it uses as much as digits as its factorization.

199194194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99597099.

The product of its digits is 104976, while the sum is 47.

The square root of 199194194 is about 14113.6173251226. The cubic root of 199194194 is about 584.0170934666.

The spelling of 199194194 in words is "one hundred ninety-nine million, one hundred ninety-four thousand, one hundred ninety-four".