129808855 has 32 divisors (see below), whose sum is σ = 189423360. Its totient is φ = 84165120.

The previous prime is 129808853. The next prime is 129808891. The reversal of 129808855 is 558808921.

It is not a de Polignac number, because 129808855 - 2¹ = 129808853 is a prime.

It is a super-2 number, since 2×129808855² = 33700677672822050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129808853) 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 31 ways as a sum of consecutive naturals, for example, 14112 + ... + 21418.

It is an arithmetic number, because the mean of its divisors is an integer number (5919480).

Almost surely, 2^129808855 is an apocalyptic number.

129808855 is a deficient number, since it is larger than the sum of its proper divisors (59614505).

129808855 is a wasteful number, since it uses less digits than its factorization.

129808855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7359.

The product of its (nonzero) digits is 230400, while the sum is 46.

The square root of 129808855 is about 11393.3689047621. The cubic root of 129808855 is about 506.3312976181.

The spelling of 129808855 in words is "one hundred twenty-nine million, eight hundred eight thousand, eight hundred fifty-five".