129917941 has 8 divisors (see below), whose sum is σ = 136677600. Its totient is φ = 123310320.

The previous prime is 129917933. The next prime is 129917947. The reversal of 129917941 is 149719921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 129917941 - 2³ = 129917933 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 (129917947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36255 + ... + 39676.

It is an arithmetic number, because the mean of its divisors is an integer number (17084700).

Almost surely, 2^129917941 is an apocalyptic number.

It is an amenable number.

129917941 is a deficient number, since it is larger than the sum of its proper divisors (6759659).

129917941 is an equidigital number, since it uses as much as digits as its factorization.

129917941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76019.

The product of its digits is 40824, while the sum is 43.

The square root of 129917941 is about 11398.1551577437. The cubic root of 129917941 is about 506.4730912092.

The spelling of 129917941 in words is "one hundred twenty-nine million, nine hundred seventeen thousand, nine hundred forty-one".