129808853 has 2 divisors, whose sum is σ = 129808854. Its totient is φ = 129808852.

The previous prime is 129808837. The next prime is 129808891. The reversal of 129808853 is 358808921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 104387089 + 25421764 = 10217^2 + 5042^2 .

It is a cyclic number.

It is not a de Polignac number, because 129808853 - 2⁴ = 129808837 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129808813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64904426 + 64904427.

It is an arithmetic number, because the mean of its divisors is an integer number (64904427).

Almost surely, 2^129808853 is an apocalyptic number.

It is an amenable number.

129808853 is a deficient number, since it is larger than the sum of its proper divisors (1).

129808853 is an equidigital number, since it uses as much as digits as its factorization.

129808853 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 138240, while the sum is 44.

The square root of 129808853 is about 11393.3688169918. The cubic root of 129808853 is about 506.3312950177.

The spelling of 129808853 in words is "one hundred twenty-nine million, eight hundred eight thousand, eight hundred fifty-three".