212010709 has 2 divisors, whose sum is σ = 212010710. Its totient is φ = 212010708.

The previous prime is 212010707. The next prime is 212010731. The reversal of 212010709 is 907010212.

It is an a-pointer prime, because the next prime (212010731) can be obtained adding 212010709 to its sum of digits (22).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 211789809 + 220900 = 14553^2 + 470^2 .

It is a cyclic number.

It is not a de Polignac number, because 212010709 - 2¹ = 212010707 is a prime.

Together with 212010707, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 212010709.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212010707) 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, 106005354 + 106005355.

It is an arithmetic number, because the mean of its divisors is an integer number (106005355).

Almost surely, 2^212010709 is an apocalyptic number.

It is an amenable number.

212010709 is a deficient number, since it is larger than the sum of its proper divisors (1).

212010709 is an equidigital number, since it uses as much as digits as its factorization.

212010709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 252, while the sum is 22.

The square root of 212010709 is about 14560.5875224869. The cubic root of 212010709 is about 596.2832356834.

The spelling of 212010709 in words is "two hundred twelve million, ten thousand, seven hundred nine".