5623809 has 4 divisors (see below), whose sum is σ = 7498416. Its totient is φ = 3749204.

The previous prime is 5623789. The next prime is 5623811. The reversal of 5623809 is 9083265.

It is a happy number.

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 5623809 - 2¹⁵ = 5591041 is a prime.

It is a D-number.

It is a self number, because there is not a number n which added to its sum of digits gives 5623809.

It is not an unprimeable number, because it can be changed into a prime (5623859) 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, 937299 + ... + 937304.

It is an arithmetic number, because the mean of its divisors is an integer number (1874604).

It is a Proth number, since it is equal to 1373 ⋅ 2¹² + 1 and 1373 < 2¹².

Almost surely, 2^5623809 is an apocalyptic number.

It is an amenable number.

5623809 is a deficient number, since it is larger than the sum of its proper divisors (1874607).

5623809 is a wasteful number, since it uses less digits than its factorization.

5623809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1874606.

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 5623809 is about 2371.4571469879. The cubic root of 5623809 is about 177.8321124573.

It can be divided in two parts, 562 and 3809, that added together give a triangular number (4371 = T₉₃).

The spelling of 5623809 in words is "five million, six hundred twenty-three thousand, eight hundred nine".