5638811 has 2 divisors, whose sum is σ = 5638812. Its totient is φ = 5638810.

The previous prime is 5638799. The next prime is 5638817. The reversal of 5638811 is 1188365.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5638811 is a prime.

It is a plaindrome in base 13.

It is not a weakly prime, because it can be changed into another prime (5638817) 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, 2819405 + 2819406.

It is an arithmetic number, because the mean of its divisors is an integer number (2819406).

Almost surely, 2^5638811 is an apocalyptic number.

5638811 is a deficient number, since it is larger than the sum of its proper divisors (1).

5638811 is an equidigital number, since it uses as much as digits as its factorization.

5638811 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5760, while the sum is 32.

The square root of 5638811 is about 2374.6180745543. The cubic root of 5638811 is about 177.9900996051.

The spelling of 5638811 in words is "five million, six hundred thirty-eight thousand, eight hundred eleven".