129991697207 has 16 divisors (see below), whose sum is σ = 132541339392. Its totient is φ = 127472755200.

The previous prime is 129991697203. The next prime is 129991697219. The reversal of 129991697207 is 702796199921.

It is a cyclic number.

It is not a de Polignac number, because 129991697207 - 2² = 129991697203 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 129991697207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129991697201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4422383 + ... + 4451679.

It is an arithmetic number, because the mean of its divisors is an integer number (8283833712).

Almost surely, 2^129991697207 is an apocalyptic number.

129991697207 is a deficient number, since it is larger than the sum of its proper divisors (2549642185).

129991697207 is a wasteful number, since it uses less digits than its factorization.

129991697207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29818.

The product of its (nonzero) digits is 7715736, while the sum is 62.

The spelling of 129991697207 in words is "one hundred twenty-nine billion, nine hundred ninety-one million, six hundred ninety-seven thousand, two hundred seven".