199449593 has 24 divisors (see below), whose sum is σ = 254932800. Its totient is φ = 152402688.

The previous prime is 199449577. The next prime is 199449599. The reversal of 199449593 is 395944991.

It is a happy number.

It is not a de Polignac number, because 199449593 - 2⁴ = 199449577 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (199449599) 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, 35843 + ... + 41031.

It is an arithmetic number, because the mean of its divisors is an integer number (10622200).

Almost surely, 2^199449593 is an apocalyptic number.

It is an amenable number.

199449593 is a deficient number, since it is larger than the sum of its proper divisors (55483207).

199449593 is a wasteful number, since it uses less digits than its factorization.

199449593 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5249 (or 5232 counting only the distinct ones).

The product of its digits is 1574640, while the sum is 53.

The square root of 199449593 is about 14122.6623906401. The cubic root of 199449593 is about 584.2665881534.

The spelling of 199449593 in words is "one hundred ninety-nine million, four hundred forty-nine thousand, five hundred ninety-three".