129689318401 has 2 divisors, whose sum is σ = 129689318402. Its totient is φ = 129689318400.

The previous prime is 129689318393. The next prime is 129689318413. The reversal of 129689318401 is 104813986921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 104070114801 + 25619203600 = 322599^2 + 160060^2 .

It is a cyclic number.

It is not a de Polignac number, because 129689318401 - 2³ = 129689318393 is a prime.

It is not a weakly prime, because it can be changed into another prime (129689318471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64844659200 + 64844659201.

It is an arithmetic number, because the mean of its divisors is an integer number (64844659201).

Almost surely, 2^129689318401 is an apocalyptic number.

It is an amenable number.

129689318401 is a deficient number, since it is larger than the sum of its proper divisors (1).

129689318401 is an equidigital number, since it uses as much as digits as its factorization.

129689318401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 746496, while the sum is 52.

The spelling of 129689318401 in words is "one hundred twenty-nine billion, six hundred eighty-nine million, three hundred eighteen thousand, four hundred one".