5640309 has 6 divisors (see below), whose sum is σ = 8147126. Its totient is φ = 3760200.

The previous prime is 5640293. The next prime is 5640331. The reversal of 5640309 is 9030465.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 5616900 + 23409 = 2370^2 + 153^2 .

It is not a de Polignac number, because 5640309 - 2⁴ = 5640293 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 (5640389) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 313342 + ... + 313359.

Almost surely, 2^5640309 is an apocalyptic number.

It is an amenable number.

5640309 is a deficient number, since it is larger than the sum of its proper divisors (2506817).

5640309 is a wasteful number, since it uses less digits than its factorization.

5640309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 626707 (or 626704 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 5640309 is about 2374.9334727524. The cubic root of 5640309 is about 178.0058597574.

The spelling of 5640309 in words is "five million, six hundred forty thousand, three hundred nine".