5136809 has 2 divisors, whose sum is σ = 5136810. Its totient is φ = 5136808.

The previous prime is 5136773. The next prime is 5136811. The reversal of 5136809 is 9086315.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3168400 + 1968409 = 1780^2 + 1403^2 .

It is a cyclic number.

It is not a de Polignac number, because 5136809 - 2⁸ = 5136553 is a prime.

Together with 5136811, 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 (5136709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2568404 + 2568405.

It is an arithmetic number, because the mean of its divisors is an integer number (2568405).

Almost surely, 2^5136809 is an apocalyptic number.

It is an amenable number.

5136809 is a deficient number, since it is larger than the sum of its proper divisors (1).

5136809 is an equidigital number, since it uses as much as digits as its factorization.

5136809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 5136809 is about 2266.4529556115. The cubic root of 5136809 is about 172.5431831956.

The spelling of 5136809 in words is "five million, one hundred thirty-six thousand, eight hundred nine".