129922881 has 8 divisors (see below), whose sum is σ = 188978784. Its totient is φ = 78741120.

The previous prime is 129922843. The next prime is 129922889. The reversal of 129922881 is 188229921.

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

It is not a de Polignac number, because 129922881 - 2¹⁹ = 129398593 is a prime.

It is a super-2 number, since 2×129922881² = 33759910014680322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (129922889) 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, 1968496 + ... + 1968561.

It is an arithmetic number, because the mean of its divisors is an integer number (23622348).

Almost surely, 2^129922881 is an apocalyptic number.

129922881 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

129922881 is a deficient number, since it is larger than the sum of its proper divisors (59055903).

129922881 is a wasteful number, since it uses less digits than its factorization.

129922881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3937071.

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

The square root of 129922881 is about 11398.3718574189. The cubic root of 129922881 is about 506.4795105057.

The spelling of 129922881 in words is "one hundred twenty-nine million, nine hundred twenty-two thousand, eight hundred eighty-one".