212873 has 2 divisors, whose sum is σ = 212874. Its totient is φ = 212872.

The previous prime is 212869. The next prime is 212881. The reversal of 212873 is 378212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 190969 + 21904 = 437^2 + 148^2 .

It is a cyclic number.

It is not a de Polignac number, because 212873 - 2² = 212869 is a prime.

It is not a weakly prime, because it can be changed into another prime (212843) 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 as a sum of consecutive naturals, namely, 106436 + 106437.

It is an arithmetic number, because the mean of its divisors is an integer number (106437).

2²¹²⁸⁷³ is an apocalyptic number.

It is an amenable number.

212873 is a deficient number, since it is larger than the sum of its proper divisors (1).

212873 is an equidigital number, since it uses as much as digits as its factorization.

212873 is an odious number, because the sum of its binary digits is odd.

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

The square root of 212873 is about 461.3816207870. The cubic root of 212873 is about 59.7090544212.

The spelling of 212873 in words is "two hundred twelve thousand, eight hundred seventy-three".