129884833 has 4 divisors (see below), whose sum is σ = 139875988. Its totient is φ = 119893680.

The previous prime is 129884813. The next prime is 129884851. The reversal of 129884833 is 338488921.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 56731024 + 73153809 = 7532^2 + 8553^2 .

It is a cyclic number.

It is not a de Polignac number, because 129884833 - 2⁵ = 129884801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129884803) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4995558 + ... + 4995583.

It is an arithmetic number, because the mean of its divisors is an integer number (34968997).

Almost surely, 2^129884833 is an apocalyptic number.

129884833 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

129884833 is a deficient number, since it is larger than the sum of its proper divisors (9991155).

129884833 is an equidigital number, since it uses as much as digits as its factorization.

129884833 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9991154.

The product of its digits is 331776, while the sum is 46.

The square root of 129884833 is about 11396.7027249113. The cubic root of 129884833 is about 506.4300647276.

The spelling of 129884833 in words is "one hundred twenty-nine million, eight hundred eighty-four thousand, eight hundred thirty-three".