5639723 has 2 divisors, whose sum is σ = 5639724. Its totient is φ = 5639722.

The previous prime is 5639707. The next prime is 5639729. The reversal of 5639723 is 3279365.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 5639723 - 2⁴ = 5639707 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (5639729) 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 as a sum of consecutive naturals, namely, 2819861 + 2819862.

It is an arithmetic number, because the mean of its divisors is an integer number (2819862).

Almost surely, 2^5639723 is an apocalyptic number.

5639723 is a deficient number, since it is larger than the sum of its proper divisors (1).

5639723 is an equidigital number, since it uses as much as digits as its factorization.

5639723 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34020, while the sum is 35.

The square root of 5639723 is about 2374.8100976710. The cubic root of 5639723 is about 177.9996949033. Note that the first 3 decimals are identical.

The spelling of 5639723 in words is "five million, six hundred thirty-nine thousand, seven hundred twenty-three".