129918361 has 8 divisors (see below), whose sum is σ = 130987584. Its totient is φ = 128853360.

The previous prime is 129918343. The next prime is 129918377. The reversal of 129918361 is 163819921.

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

It is a cyclic number.

It is not a de Polignac number, because 129918361 - 2¹¹ = 129916313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129918161) 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 7 ways as a sum of consecutive naturals, for example, 90330 + ... + 91756.

It is an arithmetic number, because the mean of its divisors is an integer number (16373448).

Almost surely, 2^129918361 is an apocalyptic number.

It is an amenable number.

129918361 is a deficient number, since it is larger than the sum of its proper divisors (1069223).

129918361 is a wasteful number, since it uses less digits than its factorization.

129918361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2111.

The product of its digits is 23328, while the sum is 40.

The square root of 129918361 is about 11398.1735817630. The cubic root of 129918361 is about 506.4736369857.

The spelling of 129918361 in words is "one hundred twenty-nine million, nine hundred eighteen thousand, three hundred sixty-one".