201797 has 2 divisors, whose sum is σ = 201798. Its totient is φ = 201796.

The previous prime is 201791. The next prime is 201809. The reversal of 201797 is 797102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 201601 + 196 = 449^2 + 14^2 .

It is a cyclic number.

It is not a de Polignac number, because 201797 - 2⁴ = 201781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100898 + 100899.

It is an arithmetic number, because the mean of its divisors is an integer number (100899).

2²⁰¹⁷⁹⁷ is an apocalyptic number.

It is an amenable number.

201797 is a deficient number, since it is larger than the sum of its proper divisors (1).

201797 is an equidigital number, since it uses as much as digits as its factorization.

201797 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 882, while the sum is 26.

The square root of 201797 is about 449.2182097823. The cubic root of 201797 is about 58.6549814594.

Adding to 201797 its reverse (797102), we get a palindrome (998899).

The spelling of 201797 in words is "two hundred one thousand, seven hundred ninety-seven".