129133813 has 2 divisors, whose sum is σ = 129133814. Its totient is φ = 129133812.

The previous prime is 129133793. The next prime is 129133903. The reversal of 129133813 is 318331921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71267364 + 57866449 = 8442^2 + 7607^2 .

It is an emirp because it is prime and its reverse (318331921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 129133813 - 2¹³ = 129125621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129433813) 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, 64566906 + 64566907.

It is an arithmetic number, because the mean of its divisors is an integer number (64566907).

Almost surely, 2^129133813 is an apocalyptic number.

It is an amenable number.

129133813 is a deficient number, since it is larger than the sum of its proper divisors (1).

129133813 is an equidigital number, since it uses as much as digits as its factorization.

129133813 is an odious number, because the sum of its binary digits is odd.

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

The square root of 129133813 is about 11363.7059536051. The cubic root of 129133813 is about 505.4520841379.

The spelling of 129133813 in words is "one hundred twenty-nine million, one hundred thirty-three thousand, eight hundred thirteen".