212389679 has 2 divisors, whose sum is σ = 212389680. Its totient is φ = 212389678.

The previous prime is 212389651. The next prime is 212389693. The reversal of 212389679 is 976983212.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 212389679 - 2²⁰ = 211341103 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212389579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106194839 + 106194840.

It is an arithmetic number, because the mean of its divisors is an integer number (106194840).

Almost surely, 2^212389679 is an apocalyptic number.

212389679 is a deficient number, since it is larger than the sum of its proper divisors (1).

212389679 is an equidigital number, since it uses as much as digits as its factorization.

212389679 is an evil number, because the sum of its binary digits is even.

The product of its digits is 326592, while the sum is 47.

The square root of 212389679 is about 14573.5952667830. The cubic root of 212389679 is about 596.6383104335.

The spelling of 212389679 in words is "two hundred twelve million, three hundred eighty-nine thousand, six hundred seventy-nine".