212797 has 4 divisors (see below), whose sum is σ = 229180. Its totient is φ = 196416.

The previous prime is 212791. The next prime is 212801. The reversal of 212797 is 797212.

It is a happy number.

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 47961 + 164836 = 219^2 + 406^2 .

It is a cyclic number.

It is not a de Polignac number, because 212797 - 2⁷ = 212669 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8172 + ... + 8197.

It is an arithmetic number, because the mean of its divisors is an integer number (57295).

2²¹²⁷⁹⁷ is an apocalyptic number.

It is an amenable number.

212797 is a deficient number, since it is larger than the sum of its proper divisors (16383).

212797 is a wasteful number, since it uses less digits than its factorization.

212797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16382.

The product of its digits is 1764, while the sum is 28.

The square root of 212797 is about 461.2992521130. The cubic root of 212797 is about 59.7019477922.

The spelling of 212797 in words is "two hundred twelve thousand, seven hundred ninety-seven".