129140509417 has 4 divisors (see below), whose sum is σ = 129144457296. Its totient is φ = 129136561540.

The previous prime is 129140509403. The next prime is 129140509429. The reversal of 129140509417 is 714905041921.

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 a de Polignac number, because none of the positive numbers 2^k-129140509417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129140509217) 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, 1924459 + ... + 1990432.

It is an arithmetic number, because the mean of its divisors is an integer number (32286114324).

Almost surely, 2^129140509417 is an apocalyptic number.

It is an amenable number.

129140509417 is a deficient number, since it is larger than the sum of its proper divisors (3947879).

129140509417 is an equidigital number, since it uses as much as digits as its factorization.

129140509417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3947878.

The product of its (nonzero) digits is 90720, while the sum is 43.

The spelling of 129140509417 in words is "one hundred twenty-nine billion, one hundred forty million, five hundred nine thousand, four hundred seventeen".