13220209789 has 2 divisors, whose sum is σ = 13220209790. Its totient is φ = 13220209788.

The previous prime is 13220209771. The next prime is 13220209799. The reversal of 13220209789 is 98790202231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9842624100 + 3377585689 = 99210^2 + 58117^2 .

It is a cyclic number.

It is not a de Polignac number, because 13220209789 - 2⁵ = 13220209757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13220209759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6610104894 + 6610104895.

It is an arithmetic number, because the mean of its divisors is an integer number (6610104895).

Almost surely, 2^13220209789 is an apocalyptic number.

It is an amenable number.

13220209789 is a deficient number, since it is larger than the sum of its proper divisors (1).

13220209789 is an equidigital number, since it uses as much as digits as its factorization.

13220209789 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 43.

The spelling of 13220209789 in words is "thirteen billion, two hundred twenty million, two hundred nine thousand, seven hundred eighty-nine".