199724107 has 16 divisors (see below), whose sum is σ = 221045760. Its totient is φ = 178948800.

The previous prime is 199724059. The next prime is 199724117. The reversal of 199724107 is 701427991.

It is a cyclic number.

It is not a de Polignac number, because 199724107 - 2¹¹ = 199722059 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 199724107.

It is not an unprimeable number, because it can be changed into a prime (199724117) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 463182 + ... + 463612.

It is an arithmetic number, because the mean of its divisors is an integer number (13815360).

Almost surely, 2^199724107 is an apocalyptic number.

199724107 is a deficient number, since it is larger than the sum of its proper divisors (21321653).

199724107 is a wasteful number, since it uses less digits than its factorization.

199724107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 954.

The product of its (nonzero) digits is 31752, while the sum is 40.

The square root of 199724107 is about 14132.3779669240. The cubic root of 199724107 is about 584.5345185573.

The spelling of 199724107 in words is "one hundred ninety-nine million, seven hundred twenty-four thousand, one hundred seven".