199959650 has 24 divisors (see below), whose sum is σ = 405737424. Its totient is φ = 72712400.

The previous prime is 199959623. The next prime is 199959653. The reversal of 199959650 is 56959991.

199959650 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 199959592 and 199959601.

It is not an unprimeable number, because it can be changed into a prime (199959653) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 181232 + ... + 182331.

It is an arithmetic number, because the mean of its divisors is an integer number (16905726).

Almost surely, 2^199959650 is an apocalyptic number.

199959650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

199959650 is an abundant number, since it is smaller than the sum of its proper divisors (205777774).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

199959650 is a wasteful number, since it uses less digits than its factorization.

199959650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363586 (or 363581 counting only the distinct ones).

The product of its (nonzero) digits is 984150, while the sum is 53.

The square root of 199959650 is about 14140.7089638391. The cubic root of 199959650 is about 584.7642169589.

The spelling of 199959650 in words is "one hundred ninety-nine million, nine hundred fifty-nine thousand, six hundred fifty".