13775009 has 2 divisors, whose sum is σ = 13775010. Its totient is φ = 13775008.

The previous prime is 13774997. The next prime is 13775011. The reversal of 13775009 is 90057731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8392609 + 5382400 = 2897^2 + 2320^2 .

It is a cyclic number.

It is not a de Polignac number, because 13775009 - 2²⁰ = 12726433 is a prime.

Together with 13775011, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13775059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6887504 + 6887505.

It is an arithmetic number, because the mean of its divisors is an integer number (6887505).

Almost surely, 2^13775009 is an apocalyptic number.

It is an amenable number.

13775009 is a deficient number, since it is larger than the sum of its proper divisors (1).

13775009 is an equidigital number, since it uses as much as digits as its factorization.

13775009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6615, while the sum is 32.

The square root of 13775009 is about 3711.4699244369. The cubic root of 13775009 is about 239.7161516931.

The spelling of 13775009 in words is "thirteen million, seven hundred seventy-five thousand, nine".