13475809 has 2 divisors, whose sum is σ = 13475810. Its totient is φ = 13475808.

The previous prime is 13475771. The next prime is 13475827. The reversal of 13475809 is 90857431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9941409 + 3534400 = 3153^2 + 1880^2 .

It is a cyclic number.

It is not a de Polignac number, because 13475809 - 2²¹ = 11378657 is a prime.

It is a Chen prime.

It is equal to p₈₇₈₁₅₈ and since 13475809 and 878158 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (13475879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6737904 + 6737905.

It is an arithmetic number, because the mean of its divisors is an integer number (6737905).

Almost surely, 2^13475809 is an apocalyptic number.

It is an amenable number.

13475809 is a deficient number, since it is larger than the sum of its proper divisors (1).

13475809 is an equidigital number, since it uses as much as digits as its factorization.

13475809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 13475809 is about 3670.9411599752. The cubic root of 13475809 is about 237.9678475032.

The spelling of 13475809 in words is "thirteen million, four hundred seventy-five thousand, eight hundred nine".