5966809 has 4 divisors (see below), whose sum is σ = 6105616. Its totient is φ = 5828004.

The previous prime is 5966803. The next prime is 5966839. The reversal of 5966809 is 9086695.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 5966809 - 2¹⁵ = 5934041 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43), and also a Moran number because the ratio is a prime number: 138763 = 5966809 / (5 + 9 + 6 + 6 + 8 + 0 + 9).

It is a Duffinian number.

5966809 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (5966803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69339 + ... + 69424.

It is an arithmetic number, because the mean of its divisors is an integer number (1526404).

Almost surely, 2^5966809 is an apocalyptic number.

It is an amenable number.

5966809 is a deficient number, since it is larger than the sum of its proper divisors (138807).

5966809 is a wasteful number, since it uses less digits than its factorization.

5966809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138806.

The product of its (nonzero) digits is 116640, while the sum is 43.

The square root of 5966809 is about 2442.7052626136. The cubic root of 5966809 is about 181.3763725904.

The spelling of 5966809 in words is "five million, nine hundred sixty-six thousand, eight hundred nine".