5711809 has 2 divisors, whose sum is σ = 5711810. Its totient is φ = 5711808.

The previous prime is 5711807. The next prime is 5711821. The reversal of 5711809 is 9081175.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5276209 + 435600 = 2297^2 + 660^2 .

It is a cyclic number.

It is not a de Polignac number, because 5711809 - 2¹ = 5711807 is a prime.

Together with 5711807, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (5711807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2855904 + 2855905.

It is an arithmetic number, because the mean of its divisors is an integer number (2855905).

Almost surely, 2^5711809 is an apocalyptic number.

It is an amenable number.

5711809 is a deficient number, since it is larger than the sum of its proper divisors (1).

5711809 is an equidigital number, since it uses as much as digits as its factorization.

5711809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2520, while the sum is 31.

The square root of 5711809 is about 2389.9391205635. The cubic root of 5711809 is about 178.7548739441.

The spelling of 5711809 in words is "five million, seven hundred eleven thousand, eight hundred nine".