199345 has 4 divisors (see below), whose sum is σ = 239220. Its totient is φ = 159472.

The previous prime is 199343. The next prime is 199357. The reversal of 199345 is 543991.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 543991 = 7 ⋅77713.

It can be written as a sum of positive squares in 2 ways, for example, as 92416 + 106929 = 304^2 + 327^2 .

It is a cyclic number.

It is not a de Polignac number, because 199345 - 2¹ = 199343 is a prime.

199345 is a lucky number.

It is a nialpdrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (199343) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19930 + ... + 19939.

It is an arithmetic number, because the mean of its divisors is an integer number (59805).

2¹⁹⁹³⁴⁵ is an apocalyptic number.

It is an amenable number.

199345 is a deficient number, since it is larger than the sum of its proper divisors (39875).

199345 is an equidigital number, since it uses as much as digits as its factorization.

199345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39874.

The product of its digits is 4860, while the sum is 31.

The square root of 199345 is about 446.4806826728. The cubic root of 199345 is about 58.4164438901.

The spelling of 199345 in words is "one hundred ninety-nine thousand, three hundred forty-five".