5640709 has 2 divisors, whose sum is σ = 5640710. Its totient is φ = 5640708.

The previous prime is 5640689. The next prime is 5640721. The reversal of 5640709 is 9070465.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3150625 + 2490084 = 1775^2 + 1578^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5640709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5640769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2820354 + 2820355.

It is an arithmetic number, because the mean of its divisors is an integer number (2820355).

Almost surely, 2^5640709 is an apocalyptic number.

It is an amenable number.

5640709 is a deficient number, since it is larger than the sum of its proper divisors (1).

5640709 is an equidigital number, since it uses as much as digits as its factorization.

5640709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 5640709 is about 2375.0176841447. The cubic root of 5640709 is about 178.0100676038.

The spelling of 5640709 in words is "five million, six hundred forty thousand, seven hundred nine".