129908195 has 16 divisors (see below), whose sum is σ = 157982400. Its totient is φ = 102541824.

The previous prime is 129908189. The next prime is 129908257. The reversal of 129908195 is 591809921.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 129908195 - 2¹⁸ = 129646051 is a prime.

It is a super-2 number, since 2×129908195² = 33752278256316050, which contains 22 as substring.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 135839 + ... + 136791.

It is an arithmetic number, because the mean of its divisors is an integer number (9873900).

Almost surely, 2^129908195 is an apocalyptic number.

129908195 is a deficient number, since it is larger than the sum of its proper divisors (28074205).

129908195 is a wasteful number, since it uses less digits than its factorization.

129908195 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1294.

The product of its (nonzero) digits is 58320, while the sum is 44.

The square root of 129908195 is about 11397.7276243995. The cubic root of 129908195 is about 506.4604262656.

The spelling of 129908195 in words is "one hundred twenty-nine million, nine hundred eight thousand, one hundred ninety-five".