199949 has 4 divisors (see below), whose sum is σ = 202560. Its totient is φ = 197340.

The previous prime is 199933. The next prime is 199961. The reversal of 199949 is 949991.

199949 is nontrivially palindromic in base 7.

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 199949 - 2⁴ = 199933 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199909) 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, 1187 + ... + 1344.

It is an arithmetic number, because the mean of its divisors is an integer number (50640).

2¹⁹⁹⁹⁴⁹ is an apocalyptic number.

It is an amenable number.

199949 is a deficient number, since it is larger than the sum of its proper divisors (2611).

199949 is an equidigital number, since it uses as much as digits as its factorization.

199949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2610.

The product of its digits is 26244, while the sum is 41.

The square root of 199949 is about 447.1565721311. The cubic root of 199949 is about 58.4753835115.

It can be divided in two parts, 1999 and 49, that added together give a 11-th power (2048 = 2¹¹).

The spelling of 199949 in words is "one hundred ninety-nine thousand, nine hundred forty-nine".