199448999 has 4 divisors (see below), whose sum is σ = 199559760. Its totient is φ = 199338240.

The previous prime is 199448993. The next prime is 199449001. The reversal of 199448999 is 999844991.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 999844991 = 4999 ⋅200009.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-199448999 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199448993) 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 3 ways as a sum of consecutive naturals, for example, 52634 + ... + 56295.

It is an arithmetic number, because the mean of its divisors is an integer number (49889940).

Almost surely, 2^199448999 is an apocalyptic number.

199448999 is a deficient number, since it is larger than the sum of its proper divisors (110761).

199448999 is a wasteful number, since it uses less digits than its factorization.

199448999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110760.

The product of its digits is 7558272, while the sum is 62.

The square root of 199448999 is about 14122.6413605954. The cubic root of 199448999 is about 584.2660081327.

The spelling of 199448999 in words is "one hundred ninety-nine million, four hundred forty-eight thousand, nine hundred ninety-nine".