126308729089 has 2 divisors, whose sum is σ = 126308729090. Its totient is φ = 126308729088.

The previous prime is 126308729081. The next prime is 126308729147. The reversal of 126308729089 is 980927803621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 121544968689 + 4763760400 = 348633^2 + 69020^2 .

It is a cyclic number.

It is not a de Polignac number, because 126308729089 - 2³ = 126308729081 is a prime.

It is not a weakly prime, because it can be changed into another prime (126308729081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63154364544 + 63154364545.

It is an arithmetic number, because the mean of its divisors is an integer number (63154364545).

Almost surely, 2^126308729089 is an apocalyptic number.

It is an amenable number.

126308729089 is a deficient number, since it is larger than the sum of its proper divisors (1).

126308729089 is an equidigital number, since it uses as much as digits as its factorization.

126308729089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2612736, while the sum is 55.

The spelling of 126308729089 in words is "one hundred twenty-six billion, three hundred eight million, seven hundred twenty-nine thousand, eighty-nine".