129707993917 has 4 divisors (see below), whose sum is σ = 129826884096. Its totient is φ = 129589103740.

The previous prime is 129707993893. The next prime is 129707993923. The reversal of 129707993917 is 719399707921.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 129707993917 - 2¹⁹ = 129707469629 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 (129707993417) 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, 59443453 + ... + 59445634.

It is an arithmetic number, because the mean of its divisors is an integer number (32456721024).

Almost surely, 2^129707993917 is an apocalyptic number.

It is an amenable number.

129707993917 is a deficient number, since it is larger than the sum of its proper divisors (118890179).

129707993917 is a wasteful number, since it uses less digits than its factorization.

129707993917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118890178.

The product of its (nonzero) digits is 13502538, while the sum is 64.

The spelling of 129707993917 in words is "one hundred twenty-nine billion, seven hundred seven million, nine hundred ninety-three thousand, nine hundred seventeen".