199924873 has 2 divisors, whose sum is σ = 199924874. Its totient is φ = 199924872.

The previous prime is 199924871. The next prime is 199924891. The reversal of 199924873 is 378429991.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 199741689 + 183184 = 14133^2 + 428^2 .

It is a cyclic number.

It is not a de Polignac number, because 199924873 - 2¹ = 199924871 is a prime.

It is a super-2 number, since 2×199924873² = 79939909688132258, which contains 22 as substring.

Together with 199924871, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 199924873.

It is not a weakly prime, because it can be changed into another prime (199924871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99962436 + 99962437.

It is an arithmetic number, because the mean of its divisors is an integer number (99962437).

Almost surely, 2^199924873 is an apocalyptic number.

It is an amenable number.

199924873 is a deficient number, since it is larger than the sum of its proper divisors (1).

199924873 is an equidigital number, since it uses as much as digits as its factorization.

199924873 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 979776, while the sum is 52.

The square root of 199924873 is about 14139.4792336917. The cubic root of 199924873 is about 584.7303142453.

The spelling of 199924873 in words is "one hundred ninety-nine million, nine hundred twenty-four thousand, eight hundred seventy-three".