129882889 has 2 divisors, whose sum is σ = 129882890. Its totient is φ = 129882888.

The previous prime is 129882881. The next prime is 129882899. The reversal of 129882889 is 988288921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 129846025 + 36864 = 11395^2 + 192^2 .

It is a cyclic number.

It is not a de Polignac number, because 129882889 - 2³ = 129882881 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (129882881) 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 as a sum of consecutive naturals, namely, 64941444 + 64941445.

It is an arithmetic number, because the mean of its divisors is an integer number (64941445).

Almost surely, 2^129882889 is an apocalyptic number.

It is an amenable number.

129882889 is a deficient number, since it is larger than the sum of its proper divisors (1).

129882889 is an equidigital number, since it uses as much as digits as its factorization.

129882889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1327104, while the sum is 55.

The square root of 129882889 is about 11396.6174367661. The cubic root of 129882889 is about 506.4275381175.

The spelling of 129882889 in words is "one hundred twenty-nine million, eight hundred eighty-two thousand, eight hundred eighty-nine".