5644999 has 4 divisors (see below), whose sum is σ = 5697864. Its totient is φ = 5592136.

The previous prime is 5644993. The next prime is 5645011. The reversal of 5644999 is 9994465.

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 5644999 - 2⁵ = 5644967 is a prime.

It is a Duffinian number.

5644999 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5644993) 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, 26272 + ... + 26485.

It is an arithmetic number, because the mean of its divisors is an integer number (1424466).

Almost surely, 2^5644999 is an apocalyptic number.

5644999 is a deficient number, since it is larger than the sum of its proper divisors (52865).

5644999 is a wasteful number, since it uses less digits than its factorization.

5644999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52864.

The product of its digits is 349920, while the sum is 46.

The square root of 5644999 is about 2375.9206636586. The cubic root of 5644999 is about 178.0551842533.

The spelling of 5644999 in words is "five million, six hundred forty-four thousand, nine hundred ninety-nine".