13122389809 has 3 divisors (see below), whose sum is σ = 13122504363. Its totient is φ = 13122275256.

The previous prime is 13122389783. The next prime is 13122389821. The reversal of 13122389809 is 90898322131.

The square root of 13122389809 is 114553.

It is a perfect power (a square), and thus also a powerful number.

13122389809 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 90898322131 = 751 ⋅121036381.

It can be written as a sum of positive squares in only one way, i.e., 785400625 + 12336989184 = 28025^2 + 111072^2 .

It is not a de Polignac number, because 13122389809 - 2⁹ = 13122389297 is a prime.

It is a super-2 number, since 2×13122389809² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13122389899) 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 in 2 ways as a sum of consecutive naturals, for example, 57277 + ... + 171829.

It is an arithmetic number, because the mean of its divisors is an integer number (4374168121).

Almost surely, 2^13122389809 is an apocalyptic number.

13122389809 is the 114553-rd square number.

13122389809 is the 57277-th centered octagonal number.

It is an amenable number.

13122389809 is a deficient number, since it is larger than the sum of its proper divisors (114554).

13122389809 is an frugal number, since it uses more digits than its factorization.

13122389809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229106 (or 114553 counting only the distinct ones).

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

The spelling of 13122389809 in words is "thirteen billion, one hundred twenty-two million, three hundred eighty-nine thousand, eight hundred nine".