129718247039 has 4 divisors (see below), whose sum is σ = 129721809456. Its totient is φ = 129714684624.

The previous prime is 129718247027. The next prime is 129718247047. The reversal of 129718247039 is 930742817921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 930742817921 = 7 ⋅132963259703.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129718247039 is a prime.

It is a super-2 number, since 2×129718247039² (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 (129718247069) 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, 1726019 + ... + 1799604.

It is an arithmetic number, because the mean of its divisors is an integer number (32430452364).

Almost surely, 2^129718247039 is an apocalyptic number.

129718247039 is a deficient number, since it is larger than the sum of its proper divisors (3562417).

129718247039 is an equidigital number, since it uses as much as digits as its factorization.

129718247039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3562416.

The product of its (nonzero) digits is 1524096, while the sum is 53.

The spelling of 129718247039 in words is "one hundred twenty-nine billion, seven hundred eighteen million, two hundred forty-seven thousand, thirty-nine".