199999430 has 16 divisors (see below), whose sum is σ = 369729360. Its totient is φ = 77837472.

The previous prime is 199999427. The next prime is 199999447. The reversal of 199999430 is 34999991.

199999430 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 269900 + ... + 270639.

It is an arithmetic number, because the mean of its divisors is an integer number (23108085).

Almost surely, 2^199999430 is an apocalyptic number.

199999430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

199999430 is a deficient number, since it is larger than the sum of its proper divisors (169729930).

199999430 is a wasteful number, since it uses less digits than its factorization.

199999430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540583.

The product of its (nonzero) digits is 708588, while the sum is 53.

The square root of 199999430 is about 14142.1154711733. The cubic root of 199999430 is about 584.8029920787.

The spelling of 199999430 in words is "one hundred ninety-nine million, nine hundred ninety-nine thousand, four hundred thirty".