199369 has 4 divisors (see below), whose sum is σ = 200596. Its totient is φ = 198144.

The previous prime is 199357. The next prime is 199373. The reversal of 199369 is 963991.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 963991 = 7 ⋅137713.

It can be written as a sum of positive squares in 2 ways, for example, as 131769 + 67600 = 363^2 + 260^2 .

It is a cyclic number.

It is not a de Polignac number, because 199369 - 2⁵ = 199337 is a prime.

It is a super-2 number, since 2×199369² = 79495996322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199379) 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, 324 + ... + 709.

It is an arithmetic number, because the mean of its divisors is an integer number (50149).

2¹⁹⁹³⁶⁹ is an apocalyptic number.

It is an amenable number.

199369 is a deficient number, since it is larger than the sum of its proper divisors (1227).

199369 is a wasteful number, since it uses less digits than its factorization.

199369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1226.

The product of its digits is 13122, while the sum is 37.

The square root of 199369 is about 446.5075587266. The cubic root of 199369 is about 58.4187881315.

The spelling of 199369 in words is "one hundred ninety-nine thousand, three hundred sixty-nine".