199118369 has 4 divisors (see below), whose sum is σ = 201089940. Its totient is φ = 197146800.

The previous prime is 199118357. The next prime is 199118389. The reversal of 199118369 is 963811991.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 123654400 + 75463969 = 11120^2 + 8687^2 .

It is a cyclic number.

It is not a de Polignac number, because 199118369 - 2¹² = 199114273 is a prime.

It is a super-2 number, since 2×199118369² = 79296249746440322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (199118389) 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, 985634 + ... + 985835.

It is an arithmetic number, because the mean of its divisors is an integer number (50272485).

Almost surely, 2^199118369 is an apocalyptic number.

It is an amenable number.

199118369 is a deficient number, since it is larger than the sum of its proper divisors (1971571).

199118369 is a wasteful number, since it uses less digits than its factorization.

199118369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1971570.

The product of its digits is 104976, while the sum is 47.

The square root of 199118369 is about 14110.9308339315. The cubic root of 199118369 is about 583.9429803356.

The spelling of 199118369 in words is "one hundred ninety-nine million, one hundred eighteen thousand, three hundred sixty-nine".