129831833 has 2 divisors, whose sum is σ = 129831834. Its totient is φ = 129831832.

The previous prime is 129831817. The next prime is 129831841. The reversal of 129831833 is 338138921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 128777104 + 1054729 = 11348^2 + 1027^2 .

It is a cyclic number.

It is not a de Polignac number, because 129831833 - 2⁴ = 129831817 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (129831893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64915916 + 64915917.

It is an arithmetic number, because the mean of its divisors is an integer number (64915917).

Almost surely, 2^129831833 is an apocalyptic number.

It is an amenable number.

129831833 is a deficient number, since it is larger than the sum of its proper divisors (1).

129831833 is an equidigital number, since it uses as much as digits as its factorization.

129831833 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 38.

The square root of 129831833 is about 11394.3772537160. The cubic root of 129831833 is about 506.3611717848.

The spelling of 129831833 in words is "one hundred twenty-nine million, eight hundred thirty-one thousand, eight hundred thirty-three".