5664921 has 4 divisors (see below), whose sum is σ = 7553232. Its totient is φ = 3776612.

The previous prime is 5664851. The next prime is 5664931. The reversal of 5664921 is 1294665.

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 5664921 - 2¹⁰ = 5663897 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (5664931) 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, 944151 + ... + 944156.

It is an arithmetic number, because the mean of its divisors is an integer number (1888308).

Almost surely, 2^5664921 is an apocalyptic number.

It is an amenable number.

5664921 is a deficient number, since it is larger than the sum of its proper divisors (1888311).

5664921 is a wasteful number, since it uses less digits than its factorization.

5664921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1888310.

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

The square root of 5664921 is about 2380.1094512648. The cubic root of 5664921 is about 178.2643989740.

The spelling of 5664921 in words is "five million, six hundred sixty-four thousand, nine hundred twenty-one".