199442449 has 4 divisors (see below), whose sum is σ = 209939440. Its totient is φ = 188945460.

The previous prime is 199442431. The next prime is 199442459. The reversal of 199442449 is 944244991.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 199442449 - 2⁵ = 199442417 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 199442399 and 199442408.

It is not an unprimeable number, because it can be changed into a prime (199442459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5248467 + ... + 5248504.

It is an arithmetic number, because the mean of its divisors is an integer number (52484860).

Almost surely, 2^199442449 is an apocalyptic number.

199442449 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

199442449 is a deficient number, since it is larger than the sum of its proper divisors (10496991).

199442449 is a wasteful number, since it uses less digits than its factorization.

199442449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10496990.

The product of its digits is 373248, while the sum is 46.

The square root of 199442449 is about 14122.4094615614. The cubic root of 199442449 is about 584.2596122048.

The spelling of 199442449 in words is "one hundred ninety-nine million, four hundred forty-two thousand, four hundred forty-nine".