5663809 has 4 divisors (see below), whose sum is σ = 5671620. Its totient is φ = 5656000.

The previous prime is 5663807. The next prime is 5663821. The reversal of 5663809 is 9083665.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3814209 + 1849600 = 1953^2 + 1360^2 .

It is a cyclic number.

It is not a de Polignac number, because 5663809 - 2¹ = 5663807 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5663803) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2692 + ... + 4309.

It is an arithmetic number, because the mean of its divisors is an integer number (1417905).

Almost surely, 2^5663809 is an apocalyptic number.

It is an amenable number.

5663809 is a deficient number, since it is larger than the sum of its proper divisors (7811).

5663809 is an equidigital number, since it uses as much as digits as its factorization.

5663809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7810.

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 5663809 is about 2379.8758370974. The cubic root of 5663809 is about 178.2527340285.

The spelling of 5663809 in words is "five million, six hundred sixty-three thousand, eight hundred nine".