212783 has 4 divisors (see below), whose sum is σ = 213720. Its totient is φ = 211848.

The previous prime is 212777. The next prime is 212791. The reversal of 212783 is 387212.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 212783 - 2¹² = 208687 is a prime.

It is an alternating number because its digits alternate between even and odd.

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 (212183) 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, 116 + ... + 662.

It is an arithmetic number, because the mean of its divisors is an integer number (53430).

2²¹²⁷⁸³ is an apocalyptic number.

212783 is a deficient number, since it is larger than the sum of its proper divisors (937).

212783 is an equidigital number, since it uses as much as digits as its factorization.

212783 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 936.

The product of its digits is 672, while the sum is 23.

The square root of 212783 is about 461.2840773320. The cubic root of 212783 is about 59.7006384918.

Adding to 212783 its reverse (387212), we get a palindrome (599995).

The spelling of 212783 in words is "two hundred twelve thousand, seven hundred eighty-three".