199913950 has 48 divisors (see below), whose sum is σ = 384725376. Its totient is φ = 77235200.

The previous prime is 199913929. The next prime is 199913951. The reversal of 199913950 is 59319991.

It is a self number, because there is not a number n which added to its sum of digits gives 199913950.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199913951) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 231219 + ... + 232081.

It is an arithmetic number, because the mean of its divisors is an integer number (8015112).

Almost surely, 2^199913950 is an apocalyptic number.

199913950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

199913950 is a deficient number, since it is larger than the sum of its proper divisors (184811426).

199913950 is a wasteful number, since it uses less digits than its factorization.

199913950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1029 (or 1024 counting only the distinct ones).

The product of its (nonzero) digits is 98415, while the sum is 46.

The square root of 199913950 is about 14139.0929694942. The cubic root of 199913950 is about 584.7196650358.

The spelling of 199913950 in words is "one hundred ninety-nine million, nine hundred thirteen thousand, nine hundred fifty".