212911879 has 2 divisors, whose sum is σ = 212911880. Its totient is φ = 212911878.

The previous prime is 212911847. The next prime is 212911957. The reversal of 212911879 is 978119212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 212911879 - 2⁵ = 212911847 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212911679) 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, 106455939 + 106455940.

It is an arithmetic number, because the mean of its divisors is an integer number (106455940).

Almost surely, 2^212911879 is an apocalyptic number.

212911879 is a deficient number, since it is larger than the sum of its proper divisors (1).

212911879 is an equidigital number, since it uses as much as digits as its factorization.

212911879 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18144, while the sum is 40.

The square root of 212911879 is about 14591.5002312990. The cubic root of 212911879 is about 597.1268927549.

The spelling of 212911879 in words is "two hundred twelve million, nine hundred eleven thousand, eight hundred seventy-nine".