199423859 has 4 divisors (see below), whose sum is σ = 200026680. Its totient is φ = 198821040.

The previous prime is 199423843. The next prime is 199423883. The reversal of 199423859 is 958324991.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 199423859 - 2⁴ = 199423843 is a prime.

It is a super-3 number, since 3×199423859³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (199425859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 300914 + ... + 301575.

It is an arithmetic number, because the mean of its divisors is an integer number (50006670).

Almost surely, 2^199423859 is an apocalyptic number.

199423859 is a deficient number, since it is larger than the sum of its proper divisors (602821).

199423859 is an equidigital number, since it uses as much as digits as its factorization.

199423859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 602820.

The product of its digits is 699840, while the sum is 50.

The square root of 199423859 is about 14121.7512724166. The cubic root of 199423859 is about 584.2414587245.

The spelling of 199423859 in words is "one hundred ninety-nine million, four hundred twenty-three thousand, eight hundred fifty-nine".