199899473 has 2 divisors, whose sum is σ = 199899474. Its totient is φ = 199899472.

The previous prime is 199899461. The next prime is 199899521. The reversal of 199899473 is 374998991.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 150013504 + 49885969 = 12248^2 + 7063^2 .

It is a cyclic number.

It is not a de Polignac number, because 199899473 - 2²⁴ = 183122257 is a prime.

It is not a weakly prime, because it can be changed into another prime (199895473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99949736 + 99949737.

It is an arithmetic number, because the mean of its divisors is an integer number (99949737).

Almost surely, 2^199899473 is an apocalyptic number.

It is an amenable number.

199899473 is a deficient number, since it is larger than the sum of its proper divisors (1).

199899473 is an equidigital number, since it uses as much as digits as its factorization.

199899473 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4408992, while the sum is 59.

The square root of 199899473 is about 14138.5810108370. The cubic root of 199899473 is about 584.7055503114.

The spelling of 199899473 in words is "one hundred ninety-nine million, eight hundred ninety-nine thousand, four hundred seventy-three".