199724950 has 12 divisors (see below), whose sum is σ = 371488500. Its totient is φ = 79889960.

The previous prime is 199724947. The next prime is 199724963. The reversal of 199724950 is 59427991.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 199724950.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1997200 + ... + 1997299.

It is an arithmetic number, because the mean of its divisors is an integer number (30957375).

Almost surely, 2^199724950 is an apocalyptic number.

199724950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

199724950 is a deficient number, since it is larger than the sum of its proper divisors (171763550).

199724950 is a wasteful number, since it uses less digits than its factorization.

199724950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3994511 (or 3994506 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 46.

The square root of 199724950 is about 14132.4077920219. The cubic root of 199724950 is about 584.5353409616.

The spelling of 199724950 in words is "one hundred ninety-nine million, seven hundred twenty-four thousand, nine hundred fifty".