212997679 has 2 divisors, whose sum is σ = 212997680. Its totient is φ = 212997678.

The previous prime is 212997677. The next prime is 212997691. The reversal of 212997679 is 976799212.

It is a happy number.

212997679 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 212997679 - 2¹ = 212997677 is a prime.

It is a super-2 number, since 2×212997679² = 90736022518774082, which contains 22 as substring.

Together with 212997677, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212997677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106498839 + 106498840.

It is an arithmetic number, because the mean of its divisors is an integer number (106498840).

Almost surely, 2^212997679 is an apocalyptic number.

212997679 is a deficient number, since it is larger than the sum of its proper divisors (1).

212997679 is an equidigital number, since it uses as much as digits as its factorization.

212997679 is an evil number, because the sum of its binary digits is even.

The product of its digits is 857304, while the sum is 52.

The square root of 212997679 is about 14594.4400029600. The cubic root of 212997679 is about 597.2070927687.

The spelling of 212997679 in words is "two hundred twelve million, nine hundred ninety-seven thousand, six hundred seventy-nine".