129815000617 has 2 divisors, whose sum is σ = 129815000618. Its totient is φ = 129815000616.

The previous prime is 129815000597. The next prime is 129815000659. The reversal of 129815000617 is 716000518921.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 129746921616 + 68079001 = 360204^2 + 8251^2 .

It is a cyclic number.

It is not a de Polignac number, because 129815000617 - 2¹⁹ = 129814476329 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 129815000617.

It is not a weakly prime, because it can be changed into another prime (129815000317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64907500308 + 64907500309.

It is an arithmetic number, because the mean of its divisors is an integer number (64907500309).

Almost surely, 2^129815000617 is an apocalyptic number.

It is an amenable number.

129815000617 is a deficient number, since it is larger than the sum of its proper divisors (1).

129815000617 is an equidigital number, since it uses as much as digits as its factorization.

129815000617 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 40.

The spelling of 129815000617 in words is "one hundred twenty-nine billion, eight hundred fifteen million, six hundred seventeen", and thus it is an aban number.