212791 has 2 divisors, whose sum is σ = 212792. Its totient is φ = 212790.

The previous prime is 212777. The next prime is 212801. The reversal of 212791 is 197212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 212791 - 2¹³ = 204599 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212701) 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 as a sum of consecutive naturals, namely, 106395 + 106396.

It is an arithmetic number, because the mean of its divisors is an integer number (106396).

2²¹²⁷⁹¹ is an apocalyptic number.

212791 is a deficient number, since it is larger than the sum of its proper divisors (1).

212791 is an equidigital number, since it uses as much as digits as its factorization.

212791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 252, while the sum is 22.

The square root of 212791 is about 461.2927486965. The cubic root of 212791 is about 59.7013866705.

The spelling of 212791 in words is "two hundred twelve thousand, seven hundred ninety-one".