5645839 has 4 divisors (see below), whose sum is σ = 5677560. Its totient is φ = 5614120.

The previous prime is 5645779. The next prime is 5645851. The reversal of 5645839 is 9385465.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 5645839 - 2⁷ = 5645711 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5645239) 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, 15592 + ... + 15949.

It is an arithmetic number, because the mean of its divisors is an integer number (1419390).

Almost surely, 2^5645839 is an apocalyptic number.

5645839 is a deficient number, since it is larger than the sum of its proper divisors (31721).

5645839 is a wasteful number, since it uses less digits than its factorization.

5645839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31720.

The product of its digits is 129600, while the sum is 40.

The square root of 5645839 is about 2376.0974306623. The cubic root of 5645839 is about 178.0640156063.

The spelling of 5645839 in words is "five million, six hundred forty-five thousand, eight hundred thirty-nine".