199504971 has 16 divisors (see below), whose sum is σ = 295948800. Its totient is φ = 132829704.

The previous prime is 199504961. The next prime is 199504973. The reversal of 199504971 is 179405991.

199504971 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 199504971 - 2⁵ = 199504939 is a prime.

It is not an unprimeable number, because it can be changed into a prime (199504973) 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, 18250 + ... + 27056.

It is an arithmetic number, because the mean of its divisors is an integer number (18496800).

Almost surely, 2^199504971 is an apocalyptic number.

199504971 is a deficient number, since it is larger than the sum of its proper divisors (96443829).

199504971 is an equidigital number, since it uses as much as digits as its factorization.

199504971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9655 (or 9649 counting only the distinct ones).

The product of its (nonzero) digits is 102060, while the sum is 45.

The square root of 199504971 is about 14124.6228622218. The cubic root of 199504971 is about 584.3206578234.

The spelling of 199504971 in words is "one hundred ninety-nine million, five hundred four thousand, nine hundred seventy-one".