5638859 has 2 divisors, whose sum is σ = 5638860. Its totient is φ = 5638858.

The previous prime is 5638823. The next prime is 5638873. The reversal of 5638859 is 9588365.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 5638859 - 2⁸ = 5638603 is a prime.

It is a Chen prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (5638159) 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, 2819429 + 2819430.

It is an arithmetic number, because the mean of its divisors is an integer number (2819430).

Almost surely, 2^5638859 is an apocalyptic number.

5638859 is a deficient number, since it is larger than the sum of its proper divisors (1).

5638859 is an equidigital number, since it uses as much as digits as its factorization.

5638859 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 259200, while the sum is 44.

The square root of 5638859 is about 2374.6281814213. The cubic root of 5638859 is about 177.9906046465.

The spelling of 5638859 in words is "five million, six hundred thirty-eight thousand, eight hundred fifty-nine".