129617295749 has 2 divisors, whose sum is σ = 129617295750. Its totient is φ = 129617295748.

The previous prime is 129617295713. The next prime is 129617295763. The reversal of 129617295749 is 947592716921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 88005375649 + 41611920100 = 296657^2 + 203990^2 .

It is a cyclic number.

It is not a de Polignac number, because 129617295749 - 2¹² = 129617291653 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 129617295691 and 129617295700.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129617295149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64808647874 + 64808647875.

It is an arithmetic number, because the mean of its divisors is an integer number (64808647875).

Almost surely, 2^129617295749 is an apocalyptic number.

It is an amenable number.

129617295749 is a deficient number, since it is larger than the sum of its proper divisors (1).

129617295749 is an equidigital number, since it uses as much as digits as its factorization.

129617295749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17146080, while the sum is 62.

The spelling of 129617295749 in words is "one hundred twenty-nine billion, six hundred seventeen million, two hundred ninety-five thousand, seven hundred forty-nine".