13609789 has 2 divisors, whose sum is σ = 13609790. Its totient is φ = 13609788.

The previous prime is 13609769. The next prime is 13609811. The reversal of 13609789 is 98790631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9060100 + 4549689 = 3010^2 + 2133^2 .

It is an emirp because it is prime and its reverse (98790631) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13609789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13609709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6804894 + 6804895.

It is an arithmetic number, because the mean of its divisors is an integer number (6804895).

Almost surely, 2^13609789 is an apocalyptic number.

It is an amenable number.

13609789 is a deficient number, since it is larger than the sum of its proper divisors (1).

13609789 is an equidigital number, since it uses as much as digits as its factorization.

13609789 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81648, while the sum is 43.

The square root of 13609789 is about 3689.1447518361. The cubic root of 13609789 is about 238.7538942924.

The spelling of 13609789 in words is "thirteen million, six hundred nine thousand, seven hundred eighty-nine".