201669 has 8 divisors (see below), whose sum is σ = 289632. Its totient is φ = 124080.

The previous prime is 201667. The next prime is 201673. The reversal of 201669 is 966102.

201669 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 201669 - 2¹ = 201667 is a prime.

It is a super-2 number, since 2×201669² = 81340771122, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201661) 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, 2547 + ... + 2624.

It is an arithmetic number, because the mean of its divisors is an integer number (36204).

2²⁰¹⁶⁶⁹ is an apocalyptic number.

It is an amenable number.

201669 is a deficient number, since it is larger than the sum of its proper divisors (87963).

201669 is a wasteful number, since it uses less digits than its factorization.

201669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5187.

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 201669 is about 449.0757174464. The cubic root of 201669 is about 58.6425772024.

The spelling of 201669 in words is "two hundred one thousand, six hundred sixty-nine".