199664499 has 8 divisors (see below), whose sum is σ = 266348992. Its totient is φ = 133044840.

The previous prime is 199664497. The next prime is 199664501. The reversal of 199664499 is 994466991.

It is an interprime number because it is at equal distance from previous prime (199664497) and next prime (199664501).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 199664499 - 2¹ = 199664497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (199664497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8497 + ... + 21714.

It is an arithmetic number, because the mean of its divisors is an integer number (33293624).

Almost surely, 2^199664499 is an apocalyptic number.

199664499 is a deficient number, since it is larger than the sum of its proper divisors (66684493).

199664499 is a wasteful number, since it uses less digits than its factorization.

199664499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32417.

The product of its digits is 3779136, while the sum is 57.

The square root of 199664499 is about 14130.2688934075. The cubic root of 199664499 is about 584.4763609968.

The spelling of 199664499 in words is "one hundred ninety-nine million, six hundred sixty-four thousand, four hundred ninety-nine".