129884813 has 2 divisors, whose sum is σ = 129884814. Its totient is φ = 129884812.

The previous prime is 129884809. The next prime is 129884851. The reversal of 129884813 is 318488921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 125731369 + 4153444 = 11213^2 + 2038^2 .

It is an emirp because it is prime and its reverse (318488921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 129884813 - 2² = 129884809 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129884803) 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, 64942406 + 64942407.

It is an arithmetic number, because the mean of its divisors is an integer number (64942407).

Almost surely, 2^129884813 is an apocalyptic number.

It is an amenable number.

129884813 is a deficient number, since it is larger than the sum of its proper divisors (1).

129884813 is an equidigital number, since it uses as much as digits as its factorization.

129884813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 110592, while the sum is 44.

The square root of 129884813 is about 11396.7018474645. The cubic root of 129884813 is about 506.4300387337.

The spelling of 129884813 in words is "one hundred twenty-nine million, eight hundred eighty-four thousand, eight hundred thirteen".