5478809 has 4 divisors (see below), whose sum is σ = 6261504. Its totient is φ = 4696116.

The previous prime is 5478787. The next prime is 5478817. The reversal of 5478809 is 9088745.

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 5478809 - 2¹⁶ = 5413273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5478839) 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, 391337 + ... + 391350.

It is an arithmetic number, because the mean of its divisors is an integer number (1565376).

Almost surely, 2^5478809 is an apocalyptic number.

It is an amenable number.

5478809 is a deficient number, since it is larger than the sum of its proper divisors (782695).

5478809 is an equidigital number, since it uses as much as digits as its factorization.

5478809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 782694.

The product of its (nonzero) digits is 80640, while the sum is 41.

The square root of 5478809 is about 2340.6855833281. The cubic root of 5478809 is about 176.2904231344.

The spelling of 5478809 in words is "five million, four hundred seventy-eight thousand, eight hundred nine".