201693 has 4 divisors (see below), whose sum is σ = 268928. Its totient is φ = 134460.

The previous prime is 201683. The next prime is 201701. The reversal of 201693 is 396102.

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 not a de Polignac number, because 201693 - 2⁵ = 201661 is a prime.

It is an Ulam number.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

201693 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201623) 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, 33613 + ... + 33618.

It is an arithmetic number, because the mean of its divisors is an integer number (67232).

2²⁰¹⁶⁹³ is an apocalyptic number.

It is an amenable number.

201693 is a deficient number, since it is larger than the sum of its proper divisors (67235).

201693 is an equidigital number, since it uses as much as digits as its factorization.

201693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67234.

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 201693 is about 449.1024382031. The cubic root of 201693 is about 58.6449034003.

Adding to 201693 its reverse (396102), we get a palindrome (597795).

The spelling of 201693 in words is "two hundred one thousand, six hundred ninety-three".