199964574 has 48 divisors (see below), whose sum is σ = 462881952. Its totient is φ = 62168064.

The previous prime is 199964573. The next prime is 199964587. The reversal of 199964574 is 475469991.

It is a happy number.

199964574 is a `hidden beast` number, since 1 + 9 + 9 + 9 + 64 + 574 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 199964574.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199964573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31687 + ... + 37469.

It is an arithmetic number, because the mean of its divisors is an integer number (9643374).

Almost surely, 2^199964574 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 199964574, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (231440976).

199964574 is an abundant number, since it is smaller than the sum of its proper divisors (262917378).

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

199964574 is a wasteful number, since it uses less digits than its factorization.

199964574 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5921 (or 5918 counting only the distinct ones).

The product of its digits is 2449440, while the sum is 54.

The square root of 199964574 is about 14140.8830700208. The cubic root of 199964574 is about 584.7690168529.

The spelling of 199964574 in words is "one hundred ninety-nine million, nine hundred sixty-four thousand, five hundred seventy-four".