212755679 has 2 divisors, whose sum is σ = 212755680. Its totient is φ = 212755678.

The previous prime is 212755639. The next prime is 212755733. The reversal of 212755679 is 976557212.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212755679 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212755639) 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, 106377839 + 106377840.

It is an arithmetic number, because the mean of its divisors is an integer number (106377840).

Almost surely, 2^212755679 is an apocalyptic number.

212755679 is a deficient number, since it is larger than the sum of its proper divisors (1).

212755679 is an equidigital number, since it uses as much as digits as its factorization.

212755679 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 264600, while the sum is 44.

The square root of 212755679 is about 14586.1468181285. The cubic root of 212755679 is about 596.9808322667.

The spelling of 212755679 in words is "two hundred twelve million, seven hundred fifty-five thousand, six hundred seventy-nine".