212785897 has 2 divisors, whose sum is σ = 212785898. Its totient is φ = 212785896.

The previous prime is 212785879. The next prime is 212785907. The reversal of 212785897 is 798587212.

Together with previous prime (212785879) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 188815081 + 23970816 = 13741^2 + 4896^2 .

It is a cyclic number.

It is not a de Polignac number, because 212785897 - 2²³ = 204397289 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 212785897.

It is not a weakly prime, because it can be changed into another prime (212783897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106392948 + 106392949.

It is an arithmetic number, because the mean of its divisors is an integer number (106392949).

Almost surely, 2^212785897 is an apocalyptic number.

It is an amenable number.

212785897 is a deficient number, since it is larger than the sum of its proper divisors (1).

212785897 is an equidigital number, since it uses as much as digits as its factorization.

212785897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 564480, while the sum is 49.

The square root of 212785897 is about 14587.1826272245. The cubic root of 212785897 is about 597.0090942820.

The spelling of 212785897 in words is "two hundred twelve million, seven hundred eighty-five thousand, eight hundred ninety-seven".