212209967 has 2 divisors, whose sum is σ = 212209968. Its totient is φ = 212209966.

The previous prime is 212209957. The next prime is 212209969. The reversal of 212209967 is 769902212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 212209967 - 2⁴ = 212209951 is a prime.

Together with 212209969, it forms a pair of twin primes.

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 212209967.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212209969) 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, 106104983 + 106104984.

It is an arithmetic number, because the mean of its divisors is an integer number (106104984).

Almost surely, 2^212209967 is an apocalyptic number.

212209967 is a deficient number, since it is larger than the sum of its proper divisors (1).

212209967 is an equidigital number, since it uses as much as digits as its factorization.

212209967 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 212209967 is about 14567.4282905391. The cubic root of 212209967 is about 596.4699825424.

The spelling of 212209967 in words is "two hundred twelve million, two hundred nine thousand, nine hundred sixty-seven".