5638873 has 2 divisors, whose sum is σ = 5638874. Its totient is φ = 5638872.

The previous prime is 5638859. The next prime is 5638939. The reversal of 5638873 is 3788365.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5631129 + 7744 = 2373^2 + 88^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5638873 is a prime.

It is not a weakly prime, because it can be changed into another prime (5638823) 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, 2819436 + 2819437.

It is an arithmetic number, because the mean of its divisors is an integer number (2819437).

Almost surely, 2^5638873 is an apocalyptic number.

It is an amenable number.

5638873 is a deficient number, since it is larger than the sum of its proper divisors (1).

5638873 is an equidigital number, since it uses as much as digits as its factorization.

5638873 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120960, while the sum is 40.

The square root of 5638873 is about 2374.6311292493. The cubic root of 5638873 is about 177.9907519498.

The spelling of 5638873 in words is "five million, six hundred thirty-eight thousand, eight hundred seventy-three".