201697 has 4 divisors (see below), whose sum is σ = 203796. Its totient is φ = 199600.

The previous prime is 201683. The next prime is 201701. The reversal of 201697 is 796102.

201697 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 96721 + 104976 = 311^2 + 324^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201697 is a prime.

It is a Duffinian number.

201697 is a lucky number.

It is a nialpdrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (201667) 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, 898 + ... + 1099.

It is an arithmetic number, because the mean of its divisors is an integer number (50949).

2²⁰¹⁶⁹⁷ is an apocalyptic number.

It is an amenable number.

201697 is a deficient number, since it is larger than the sum of its proper divisors (2099).

201697 is a wasteful number, since it uses less digits than its factorization.

201697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2098.

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 201697 is about 449.1068915080. The cubic root of 201697 is about 58.6452910820.

Adding to 201697 its reverse (796102), we get a palindrome (997799).

It can be divided in two parts, 201 and 697, that added together give a palindrome (898).

The spelling of 201697 in words is "two hundred one thousand, six hundred ninety-seven".