129799696429 has 12 divisors (see below), whose sum is σ = 145398971700. Its totient is φ = 115683544704.

The previous prime is 129799696417. The next prime is 129799696447. The reversal of 129799696429 is 924696997921.

It can be written as a sum of positive squares in 6 ways, for example, as 11069144100 + 118730552329 = 105210^2 + 344573^2 .

It is a de Polignac number, because none of the positive numbers 2^k-129799696429 is a prime.

It is a super-2 number, since 2×129799696429² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129799696459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13237264 + ... + 13247065.

It is an arithmetic number, because the mean of its divisors is an integer number (12116580975).

Almost surely, 2^129799696429 is an apocalyptic number.

It is an amenable number.

129799696429 is a deficient number, since it is larger than the sum of its proper divisors (15599275271).

129799696429 is a wasteful number, since it uses less digits than its factorization.

129799696429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26484384 (or 26484371 counting only the distinct ones).

The product of its digits is 238085568, while the sum is 73.

The spelling of 129799696429 in words is "one hundred twenty-nine billion, seven hundred ninety-nine million, six hundred ninety-six thousand, four hundred twenty-nine".