126876209 has 2 divisors, whose sum is σ = 126876210. Its totient is φ = 126876208.

The previous prime is 126876163. The next prime is 126876227. The reversal of 126876209 is 902678621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 122036209 + 4840000 = 11047^2 + 2200^2 .

It is a cyclic number.

It is not a de Polignac number, because 126876209 - 2¹² = 126872113 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (126876229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63438104 + 63438105.

It is an arithmetic number, because the mean of its divisors is an integer number (63438105).

Almost surely, 2^126876209 is an apocalyptic number.

It is an amenable number.

126876209 is a deficient number, since it is larger than the sum of its proper divisors (1).

126876209 is an equidigital number, since it uses as much as digits as its factorization.

126876209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 126876209 is about 11263.9339930594. The cubic root of 126876209 is about 502.4891992101.

It can be divided in two parts, 1268 and 76209, that added together give a palindrome (77477).

The spelling of 126876209 in words is "one hundred twenty-six million, eight hundred seventy-six thousand, two hundred nine".