190198399 has 2 divisors, whose sum is σ = 190198400. Its totient is φ = 190198398.

The previous prime is 190198391. The next prime is 190198409. The reversal of 190198399 is 993891091.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 190198399 - 2³ = 190198391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (190198391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95099199 + 95099200.

It is an arithmetic number, because the mean of its divisors is an integer number (95099200).

Almost surely, 2^190198399 is an apocalyptic number.

190198399 is a deficient number, since it is larger than the sum of its proper divisors (1).

190198399 is an equidigital number, since it uses as much as digits as its factorization.

190198399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 157464, while the sum is 49.

The square root of 190198399 is about 13791.2435624928. The cubic root of 190198399 is about 575.0897392389.

The spelling of 190198399 in words is "one hundred ninety million, one hundred ninety-eight thousand, three hundred ninety-nine".