212346709 has 2 divisors, whose sum is σ = 212346710. Its totient is φ = 212346708.

The previous prime is 212346697. The next prime is 212346721. The reversal of 212346709 is 907643212.

It is a balanced prime because it is at equal distance from previous prime (212346697) and next prime (212346721).

It can be written as a sum of positive squares in only one way, i.e., 203062500 + 9284209 = 14250^2 + 3047^2 .

It is a cyclic number.

It is not a de Polignac number, because 212346709 - 2⁷ = 212346581 is a prime.

It is a super-2 number, since 2×212346709² = 90182249646261362, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212346509) 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, 106173354 + 106173355.

It is an arithmetic number, because the mean of its divisors is an integer number (106173355).

Almost surely, 2^212346709 is an apocalyptic number.

It is an amenable number.

212346709 is a deficient number, since it is larger than the sum of its proper divisors (1).

212346709 is an equidigital number, since it uses as much as digits as its factorization.

212346709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 212346709 is about 14572.1209506372. The cubic root of 212346709 is about 596.5980710686.

It can be divided in two parts, 212 and 346709, that added together give a square (346921 = 589²).

The spelling of 212346709 in words is "two hundred twelve million, three hundred forty-six thousand, seven hundred nine".