126320609 has 2 divisors, whose sum is σ = 126320610. Its totient is φ = 126320608.

The previous prime is 126320603. The next prime is 126320641. The reversal of 126320609 is 906023621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 115777600 + 10543009 = 10760^2 + 3247^2 .

It is an emirp because it is prime and its reverse (906023621) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126320609 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (126320603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63160304 + 63160305.

It is an arithmetic number, because the mean of its divisors is an integer number (63160305).

Almost surely, 2^126320609 is an apocalyptic number.

It is an amenable number.

126320609 is a deficient number, since it is larger than the sum of its proper divisors (1).

126320609 is an equidigital number, since it uses as much as digits as its factorization.

126320609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 126320609 is about 11239.2441471836. The cubic root of 126320609 is about 501.7546472233.

The spelling of 126320609 in words is "one hundred twenty-six million, three hundred twenty thousand, six hundred nine".