129297820325 has 6 divisors (see below), whose sum is σ = 160329297234. Its totient is φ = 103438256240.

The previous prime is 129297820321. The next prime is 129297820369. The reversal of 129297820325 is 523028792921.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 4186348804 + 125111471521 = 64702^2 + 353711^2 .

It is not a de Polignac number, because 129297820325 - 2² = 129297820321 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129297820321) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2585956382 + ... + 2585956431.

It is an arithmetic number, because the mean of its divisors is an integer number (26721549539).

Almost surely, 2^129297820325 is an apocalyptic number.

It is an amenable number.

129297820325 is a deficient number, since it is larger than the sum of its proper divisors (31031476909).

129297820325 is an equidigital number, since it uses as much as digits as its factorization.

129297820325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5171912823 (or 5171912818 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 50.

The spelling of 129297820325 in words is "one hundred twenty-nine billion, two hundred ninety-seven million, eight hundred twenty thousand, three hundred twenty-five".