212990927 has 2 divisors, whose sum is σ = 212990928. Its totient is φ = 212990926.

The previous prime is 212990891. The next prime is 212990929. The reversal of 212990927 is 729099212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 212990927 - 2¹⁴ = 212974543 is a prime.

Together with 212990929, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212990929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106495463 + 106495464.

It is an arithmetic number, because the mean of its divisors is an integer number (106495464).

Almost surely, 2^212990927 is an apocalyptic number.

212990927 is a deficient number, since it is larger than the sum of its proper divisors (1).

212990927 is an equidigital number, since it uses as much as digits as its factorization.

212990927 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40824, while the sum is 41.

The square root of 212990927 is about 14594.2086801580. The cubic root of 212990927 is about 597.2007822384.

The spelling of 212990927 in words is "two hundred twelve million, nine hundred ninety thousand, nine hundred twenty-seven".