113129642809 has 2 divisors, whose sum is σ = 113129642810. Its totient is φ = 113129642808.

The previous prime is 113129642749. The next prime is 113129642957. The reversal of 113129642809 is 908246921311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 101982506409 + 11147136400 = 319347^2 + 105580^2 .

It is a cyclic number.

It is not a de Polignac number, because 113129642809 - 2³⁵ = 78769904441 is a prime.

It is not a weakly prime, because it can be changed into another prime (113129642209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56564821404 + 56564821405.

It is an arithmetic number, because the mean of its divisors is an integer number (56564821405).

Almost surely, 2^113129642809 is an apocalyptic number.

It is an amenable number.

113129642809 is a deficient number, since it is larger than the sum of its proper divisors (1).

113129642809 is an equidigital number, since it uses as much as digits as its factorization.

113129642809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 186624, while the sum is 46.

The spelling of 113129642809 in words is "one hundred thirteen billion, one hundred twenty-nine million, six hundred forty-two thousand, eight hundred nine".