199429899 has 8 divisors (see below), whose sum is σ = 266220240. Its totient is φ = 132796416.

The previous prime is 199429847. The next prime is 199429903. The reversal of 199429899 is 998924991.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 199429899 - 2⁹ = 199429387 is a prime.

It is not an unprimeable number, because it can be changed into a prime (199429819) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36214 + ... + 41355.

It is an arithmetic number, because the mean of its divisors is an integer number (33277530).

Almost surely, 2^199429899 is an apocalyptic number.

199429899 is a deficient number, since it is larger than the sum of its proper divisors (66790341).

199429899 is an equidigital number, since it uses as much as digits as its factorization.

199429899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78429.

The product of its digits is 3779136, while the sum is 60.

The square root of 199429899 is about 14121.9651252933. The cubic root of 199429899 is about 584.2473570204.

The spelling of 199429899 in words is "one hundred ninety-nine million, four hundred twenty-nine thousand, eight hundred ninety-nine".