199818093 has 16 divisors (see below), whose sum is σ = 274634816. Its totient is φ = 129133440.

The previous prime is 199818077. The next prime is 199818107. The reversal of 199818093 is 390818991.

It is not a de Polignac number, because 199818093 - 2⁴ = 199818077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199818023) 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 15 ways as a sum of consecutive naturals, for example, 28233 + ... + 34593.

It is an arithmetic number, because the mean of its divisors is an integer number (17164676).

Almost surely, 2^199818093 is an apocalyptic number.

It is an amenable number.

199818093 is a deficient number, since it is larger than the sum of its proper divisors (74816723).

199818093 is a wasteful number, since it uses less digits than its factorization.

199818093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6684.

The product of its (nonzero) digits is 139968, while the sum is 48.

The square root of 199818093 is about 14135.7027770111. The cubic root of 199818093 is about 584.6261940970.

The spelling of 199818093 in words is "one hundred ninety-nine million, eight hundred eighteen thousand, ninety-three".