212897 has 2 divisors, whose sum is σ = 212898. Its totient is φ = 212896.

The previous prime is 212881. The next prime is 212903. The reversal of 212897 is 798212.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 190096 + 22801 = 436^2 + 151^2 .

It is a cyclic number.

It is not a de Polignac number, because 212897 - 2⁴ = 212881 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (212827) 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, 106448 + 106449.

It is an arithmetic number, because the mean of its divisors is an integer number (106449).

2²¹²⁸⁹⁷ is an apocalyptic number.

It is an amenable number.

212897 is a deficient number, since it is larger than the sum of its proper divisors (1).

212897 is an equidigital number, since it uses as much as digits as its factorization.

212897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2016, while the sum is 29.

The square root of 212897 is about 461.4076288923. The cubic root of 212897 is about 59.7112982684.

The spelling of 212897 in words is "two hundred twelve thousand, eight hundred ninety-seven".