129401317 has 4 divisors (see below), whose sum is σ = 129682476. Its totient is φ = 129120160.

The previous prime is 129401309. The next prime is 129401323. The reversal of 129401317 is 713104921.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 27815076 + 101586241 = 5274^2 + 10079^2 .

It is a cyclic number.

It is not a de Polignac number, because 129401317 - 2³ = 129401309 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 (129401357) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 139888 + ... + 140809.

It is an arithmetic number, because the mean of its divisors is an integer number (32420619).

Almost surely, 2^129401317 is an apocalyptic number.

It is an amenable number.

129401317 is a deficient number, since it is larger than the sum of its proper divisors (281159).

129401317 is an equidigital number, since it uses as much as digits as its factorization.

129401317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281158.

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 129401317 is about 11375.4699683134. The cubic root of 129401317 is about 505.8008623923.

The spelling of 129401317 in words is "one hundred twenty-nine million, four hundred one thousand, three hundred seventeen".