129617157973 has 8 divisors (see below), whose sum is σ = 132666389856. Its totient is φ = 126569511600.

The previous prime is 129617157953. The next prime is 129617157991. The reversal of 129617157973 is 379751716921.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 129617157973 - 2⁵ = 129617157941 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 (129617157913) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 230143 + ... + 558748.

It is an arithmetic number, because the mean of its divisors is an integer number (16583298732).

Almost surely, 2^129617157973 is an apocalyptic number.

It is an amenable number.

129617157973 is a deficient number, since it is larger than the sum of its proper divisors (3049231883).

129617157973 is an equidigital number, since it uses as much as digits as its factorization.

129617157973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 792755.

The product of its digits is 5000940, while the sum is 58.

The spelling of 129617157973 in words is "one hundred twenty-nine billion, six hundred seventeen million, one hundred fifty-seven thousand, nine hundred seventy-three".