13485809 has 2 divisors, whose sum is σ = 13485810. Its totient is φ = 13485808.

The previous prime is 13485803. The next prime is 13485821. The reversal of 13485809 is 90858431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10144225 + 3341584 = 3185^2 + 1828^2 .

It is a cyclic number.

It is not a de Polignac number, because 13485809 - 2⁴ = 13485793 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (13485803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6742904 + 6742905.

It is an arithmetic number, because the mean of its divisors is an integer number (6742905).

Almost surely, 2^13485809 is an apocalyptic number.

It is an amenable number.

13485809 is a deficient number, since it is larger than the sum of its proper divisors (1).

13485809 is an equidigital number, since it uses as much as digits as its factorization.

13485809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 13485809 is about 3672.3029559120. The cubic root of 13485809 is about 238.0266959203.

The spelling of 13485809 in words is "thirteen million, four hundred eighty-five thousand, eight hundred nine".