129126485797 has 2 divisors, whose sum is σ = 129126485798. Its totient is φ = 129126485796.

The previous prime is 129126485791. The next prime is 129126485843. The reversal of 129126485797 is 797584621921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 91284953956 + 37841531841 = 302134^2 + 194529^2 .

It is a cyclic number.

It is not a de Polignac number, because 129126485797 - 2¹¹ = 129126483749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129126485791) 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, 64563242898 + 64563242899.

It is an arithmetic number, because the mean of its divisors is an integer number (64563242899).

Almost surely, 2^129126485797 is an apocalyptic number.

It is an amenable number.

129126485797 is a deficient number, since it is larger than the sum of its proper divisors (1).

129126485797 is an equidigital number, since it uses as much as digits as its factorization.

129126485797 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15240960, while the sum is 61.

The spelling of 129126485797 in words is "one hundred twenty-nine billion, one hundred twenty-six million, four hundred eighty-five thousand, seven hundred ninety-seven".