201659 has 4 divisors (see below), whose sum is σ = 202560. Its totient is φ = 200760.

The previous prime is 201653. The next prime is 201661. The reversal of 201659 is 956102.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 201659 - 2⁸ = 201403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201653) 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, 182 + ... + 660.

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

2²⁰¹⁶⁵⁹ is an apocalyptic number.

201659 is a deficient number, since it is larger than the sum of its proper divisors (901).

201659 is an equidigital number, since it uses as much as digits as its factorization.

201659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 900.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 201659 is about 449.0645833285. The cubic root of 201659 is about 58.6416078988.

The spelling of 201659 in words is "two hundred one thousand, six hundred fifty-nine".