199843345 has 24 divisors (see below), whose sum is σ = 263414592. Its totient is φ = 145454400.

The previous prime is 199843339. The next prime is 199843361. The reversal of 199843345 is 543348991.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-199843345 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 199843295 and 199843304.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 58330 + ... + 61660.

It is an arithmetic number, because the mean of its divisors is an integer number (10975608).

Almost surely, 2^199843345 is an apocalyptic number.

It is an amenable number.

199843345 is a deficient number, since it is larger than the sum of its proper divisors (63571247).

199843345 is a wasteful number, since it uses less digits than its factorization.

199843345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3433 (or 3420 counting only the distinct ones).

The product of its digits is 466560, while the sum is 46.

The square root of 199843345 is about 14136.5959481058. The cubic root of 199843345 is about 584.6508204269.

The spelling of 199843345 in words is "one hundred ninety-nine million, eight hundred forty-three thousand, three hundred forty-five".