212652689 has 2 divisors, whose sum is σ = 212652690. Its totient is φ = 212652688.

The previous prime is 212652647. The next prime is 212652701. The reversal of 212652689 is 986256212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 166616464 + 46036225 = 12908^2 + 6785^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212652689 is a prime.

It is a super-2 number, since 2×212652689² = 90442332277861442, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (212652989) 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, 106326344 + 106326345.

It is an arithmetic number, because the mean of its divisors is an integer number (106326345).

Almost surely, 2^212652689 is an apocalyptic number.

It is an amenable number.

212652689 is a deficient number, since it is larger than the sum of its proper divisors (1).

212652689 is an equidigital number, since it uses as much as digits as its factorization.

212652689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 103680, while the sum is 41.

The square root of 212652689 is about 14582.6159861665. The cubic root of 212652689 is about 596.8844886113.

The spelling of 212652689 in words is "two hundred twelve million, six hundred fifty-two thousand, six hundred eighty-nine".