5664689 has 8 divisors (see below), whose sum is σ = 6023880. Its totient is φ = 5326848.

The previous prime is 5664671. The next prime is 5664697. The reversal of 5664689 is 9864665.

It can be written as a sum of positive squares in 4 ways, for example, as 1795600 + 3869089 = 1340^2 + 1967^2 .

It is not a de Polignac number, because 5664689 - 2²⁰ = 4616113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5664629) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4337 + ... + 5489.

It is an arithmetic number, because the mean of its divisors is an integer number (752985).

Almost surely, 2^5664689 is an apocalyptic number.

It is an amenable number.

5664689 is a deficient number, since it is larger than the sum of its proper divisors (359191).

5664689 is an equidigital number, since it uses as much as digits as its factorization.

5664689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1204 (or 1170 counting only the distinct ones).

The product of its digits is 311040, while the sum is 44.

The square root of 5664689 is about 2380.0607135113. The cubic root of 5664689 is about 178.2619654064.

The spelling of 5664689 in words is "five million, six hundred sixty-four thousand, six hundred eighty-nine".