129813133 has 2 divisors, whose sum is σ = 129813134. Its totient is φ = 129813132.

The previous prime is 129813119. The next prime is 129813143. The reversal of 129813133 is 331318921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73307844 + 56505289 = 8562^2 + 7517^2 .

It is a cyclic number.

It is not a de Polignac number, because 129813133 - 2²¹ = 127715981 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 129813095 and 129813104.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129813143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64906566 + 64906567.

It is an arithmetic number, because the mean of its divisors is an integer number (64906567).

Almost surely, 2^129813133 is an apocalyptic number.

It is an amenable number.

129813133 is a deficient number, since it is larger than the sum of its proper divisors (1).

129813133 is an equidigital number, since it uses as much as digits as its factorization.

129813133 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3888, while the sum is 31.

The square root of 129813133 is about 11393.5566439984. The cubic root of 129813133 is about 506.3368598002.

The spelling of 129813133 in words is "one hundred twenty-nine million, eight hundred thirteen thousand, one hundred thirty-three".