5821609 has 4 divisors (see below), whose sum is σ = 5840640. Its totient is φ = 5802580.

The previous prime is 5821603. The next prime is 5821637. The reversal of 5821609 is 9061285.

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 5821609 - 2⁵ = 5821577 is a prime.

It is a super-2 number, since 2×5821609² = 67782262697762, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an Ulam number.

It is a Duffinian number.

5821609 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (5821603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9049 + ... + 9670.

It is an arithmetic number, because the mean of its divisors is an integer number (1460160).

Almost surely, 2^5821609 is an apocalyptic number.

It is an amenable number.

5821609 is a deficient number, since it is larger than the sum of its proper divisors (19031).

5821609 is a wasteful number, since it uses less digits than its factorization.

5821609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19030.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 5821609 is about 2412.8010692968. The cubic root of 5821609 is about 179.8930331543.

It can be divided in two parts, 582160 and 9, that added together give a square (582169 = 763²).

The spelling of 5821609 in words is "five million, eight hundred twenty-one thousand, six hundred nine".