212918369 has 2 divisors, whose sum is σ = 212918370. Its totient is φ = 212918368.

The previous prime is 212918359. The next prime is 212918399. The reversal of 212918369 is 963819212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 112678225 + 100240144 = 10615^2 + 10012^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212918369 is a prime.

It is a super-2 number, since 2×212918369² = 90668463715240322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (212918339) 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, 106459184 + 106459185.

It is an arithmetic number, because the mean of its divisors is an integer number (106459185).

Almost surely, 2^212918369 is an apocalyptic number.

It is an amenable number.

212918369 is a deficient number, since it is larger than the sum of its proper divisors (1).

212918369 is an equidigital number, since it uses as much as digits as its factorization.

212918369 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46656, while the sum is 41.

The square root of 212918369 is about 14591.7226193483. The cubic root of 212918369 is about 597.1329599194.

The spelling of 212918369 in words is "two hundred twelve million, nine hundred eighteen thousand, three hundred sixty-nine".