199899530 has 16 divisors (see below), whose sum is σ = 369544680. Its totient is φ = 77798592.

The previous prime is 199899521. The next prime is 199899533. The reversal of 199899530 is 35998991.

It can be written as a sum of positive squares in 4 ways, for example, as 174689089 + 25210441 = 13217^2 + 5021^2 .

It is not an unprimeable number, because it can be changed into a prime (199899533) 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, 269765 + ... + 270504.

Almost surely, 2^199899530 is an apocalyptic number.

199899530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

199899530 is a deficient number, since it is larger than the sum of its proper divisors (169645150).

199899530 is a wasteful number, since it uses less digits than its factorization.

199899530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540313.

The product of its (nonzero) digits is 787320, while the sum is 53.

The square root of 199899530 is about 14138.5830265978. The cubic root of 199899530 is about 584.7056058863.

The spelling of 199899530 in words is "one hundred ninety-nine million, eight hundred ninety-nine thousand, five hundred thirty".