199448369 has 4 divisors (see below), whose sum is σ = 211180644. Its totient is φ = 187716096.

The previous prime is 199448363. The next prime is 199448429. The reversal of 199448369 is 963844991.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 963844991 = 89 ⋅10829719.

It can be written as a sum of positive squares in 2 ways, for example, as 127961344 + 71487025 = 11312^2 + 8455^2 .

It is a cyclic number.

It is not a de Polignac number, because 199448369 - 2⁸ = 199448113 is a prime.

It is a super-2 number, since 2×199448369² = 79559303793520322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 199448369.

It is not an unprimeable number, because it can be changed into a prime (199448363) 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, 5866112 + ... + 5866145.

It is an arithmetic number, because the mean of its divisors is an integer number (52795161).

Almost surely, 2^199448369 is an apocalyptic number.

It is an amenable number.

199448369 is a deficient number, since it is larger than the sum of its proper divisors (11732275).

199448369 is a wasteful number, since it uses less digits than its factorization.

199448369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11732274.

The product of its digits is 1679616, while the sum is 53.

The square root of 199448369 is about 14122.6190559683. The cubic root of 199448369 is about 584.2653929579.

The spelling of 199448369 in words is "one hundred ninety-nine million, four hundred forty-eight thousand, three hundred sixty-nine".