129908481 has 8 divisors (see below), whose sum is σ = 174374400. Its totient is φ = 86024112.

The previous prime is 129908477. The next prime is 129908497. The reversal of 129908481 is 184809921.

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

It is not a de Polignac number, because 129908481 - 2² = 129908477 is a prime.

It is a super-2 number, since 2×129908481² = 33752426871454722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (129908431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 144865 + ... + 145758.

It is an arithmetic number, because the mean of its divisors is an integer number (21796800).

Almost surely, 2^129908481 is an apocalyptic number.

It is an amenable number.

129908481 is a deficient number, since it is larger than the sum of its proper divisors (44465919).

129908481 is a wasteful number, since it uses less digits than its factorization.

129908481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290775.

The product of its (nonzero) digits is 41472, while the sum is 42.

The square root of 129908481 is about 11397.7401707531. The cubic root of 129908481 is about 506.4607979321.

The spelling of 129908481 in words is "one hundred twenty-nine million, nine hundred eight thousand, four hundred eighty-one".