13055509 has 2 divisors, whose sum is σ = 13055510. Its totient is φ = 13055508.

The previous prime is 13055501. The next prime is 13055533. The reversal of 13055509 is 90555031.

13055509 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13032100 + 23409 = 3610^2 + 153^2 .

It is a cyclic number.

It is not a de Polignac number, because 13055509 - 2³ = 13055501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13055501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6527754 + 6527755.

It is an arithmetic number, because the mean of its divisors is an integer number (6527755).

Almost surely, 2^13055509 is an apocalyptic number.

It is an amenable number.

13055509 is a deficient number, since it is larger than the sum of its proper divisors (1).

13055509 is an equidigital number, since it uses as much as digits as its factorization.

13055509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3375, while the sum is 28.

The square root of 13055509 is about 3613.2407890978. The cubic root of 13055509 is about 235.4676608391.

The spelling of 13055509 in words is "thirteen million, fifty-five thousand, five hundred nine".