199444937 has 4 divisors (see below), whose sum is σ = 208116480. Its totient is φ = 190773396.

The previous prime is 199444913. The next prime is 199445009. The reversal of 199444937 is 739444991.

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, and also an emirpimes, since its reverse is a distinct semiprime: 739444991 = 109 ⋅6783899.

It is a cyclic number.

It is not a de Polignac number, because 199444937 - 2⁶ = 199444873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (199444907) 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, 4335737 + ... + 4335782.

It is an arithmetic number, because the mean of its divisors is an integer number (52029120).

Almost surely, 2^199444937 is an apocalyptic number.

It is an amenable number.

199444937 is a deficient number, since it is larger than the sum of its proper divisors (8671543).

199444937 is an equidigital number, since it uses as much as digits as its factorization.

199444937 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8671542.

The product of its digits is 979776, while the sum is 50.

The square root of 199444937 is about 14122.4975482384. The cubic root of 199444937 is about 584.2620416974.

The spelling of 199444937 in words is "one hundred ninety-nine million, four hundred forty-four thousand, nine hundred thirty-seven".