201939 has 8 divisors (see below), whose sum is σ = 272832. Its totient is φ = 132840.

The previous prime is 201937. The next prime is 201947. The reversal of 201939 is 939102.

It is a happy number.

201939 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 201939 - 2¹ = 201937 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

201939 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (201937) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 157 + ... + 654.

It is an arithmetic number, because the mean of its divisors is an integer number (34104).

2²⁰¹⁹³⁹ is an apocalyptic number.

201939 is a deficient number, since it is larger than the sum of its proper divisors (70893).

201939 is an equidigital number, since it uses as much as digits as its factorization.

201939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 897.

The product of its (nonzero) digits is 486, while the sum is 24.

The square root of 201939 is about 449.3762343516. The cubic root of 201939 is about 58.6687362964.

It can be divided in two parts, 20193 and 9, that added together give a palindrome (20202).

The spelling of 201939 in words is "two hundred one thousand, nine hundred thirty-nine".