201959 has 4 divisors (see below), whose sum is σ = 206304. Its totient is φ = 197616.

The previous prime is 201953. The next prime is 201961. The reversal of 201959 is 959102.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201959 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 201959.

It is not an unprimeable number, because it can be changed into a prime (201953) 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, 2102 + ... + 2195.

It is an arithmetic number, because the mean of its divisors is an integer number (51576).

2²⁰¹⁹⁵⁹ is an apocalyptic number.

201959 is a deficient number, since it is larger than the sum of its proper divisors (4345).

201959 is an equidigital number, since it uses as much as digits as its factorization.

201959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4344.

The product of its (nonzero) digits is 810, while the sum is 26.

The square root of 201959 is about 449.3984868688. The cubic root of 201959 is about 58.6706730792.

The spelling of 201959 in words is "two hundred one thousand, nine hundred fifty-nine".