129173740417 has 4 divisors (see below), whose sum is σ = 129499115476. Its totient is φ = 128848365360.

The previous prime is 129173740403. The next prime is 129173740427. The reversal of 129173740417 is 714047371921.

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 42535350081 + 86638390336 = 206241^2 + 294344^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129173740417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129173740427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 162686934 + ... + 162687727.

It is an arithmetic number, because the mean of its divisors is an integer number (32374778869).

Almost surely, 2^129173740417 is an apocalyptic number.

It is an amenable number.

129173740417 is a deficient number, since it is larger than the sum of its proper divisors (325375059).

129173740417 is an equidigital number, since it uses as much as digits as its factorization.

129173740417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325375058.

The product of its (nonzero) digits is 296352, while the sum is 46.

The spelling of 129173740417 in words is "one hundred twenty-nine billion, one hundred seventy-three million, seven hundred forty thousand, four hundred seventeen".