126168709 has 2 divisors, whose sum is σ = 126168710. Its totient is φ = 126168708.

The previous prime is 126168703. The next prime is 126168733. The reversal of 126168709 is 907861621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 124947684 + 1221025 = 11178^2 + 1105^2 .

It is an emirp because it is prime and its reverse (907861621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 126168709 - 2³ = 126168701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126168701) 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, 63084354 + 63084355.

It is an arithmetic number, because the mean of its divisors is an integer number (63084355).

Almost surely, 2^126168709 is an apocalyptic number.

It is an amenable number.

126168709 is a deficient number, since it is larger than the sum of its proper divisors (1).

126168709 is an equidigital number, since it uses as much as digits as its factorization.

126168709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 40.

The square root of 126168709 is about 11232.4845426112. The cubic root of 126168709 is about 501.5534472714.

The spelling of 126168709 in words is "one hundred twenty-six million, one hundred sixty-eight thousand, seven hundred nine".