5399809 has 4 divisors (see below), whose sum is σ = 5405616. Its totient is φ = 5394004.

The previous prime is 5399789. The next prime is 5399831. The reversal of 5399809 is 9089935.

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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9089935 = 5 ⋅1817987.

It is a cyclic number.

It is not a de Polignac number, because 5399809 - 2⁵ = 5399777 is a prime.

It is a Duffinian number.

5399809 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (5399839) 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, 1159 + ... + 3484.

It is an arithmetic number, because the mean of its divisors is an integer number (1351404).

Almost surely, 2^5399809 is an apocalyptic number.

It is an amenable number.

5399809 is a deficient number, since it is larger than the sum of its proper divisors (5807).

5399809 is a wasteful number, since it uses less digits than its factorization.

5399809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5806.

The product of its (nonzero) digits is 87480, while the sum is 43.

The square root of 5399809 is about 2323.7489107044. The cubic root of 5399809 is about 175.4389957966.

The spelling of 5399809 in words is "five million, three hundred ninety-nine thousand, eight hundred nine".