5641687 has 2 divisors, whose sum is σ = 5641688. Its totient is φ = 5641686.

The previous prime is 5641681. The next prime is 5641709. The reversal of 5641687 is 7861465.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 5641687 - 2³ = 5641679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5641681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2820843 + 2820844.

It is an arithmetic number, because the mean of its divisors is an integer number (2820844).

Almost surely, 2^5641687 is an apocalyptic number.

5641687 is a deficient number, since it is larger than the sum of its proper divisors (1).

5641687 is an equidigital number, since it uses as much as digits as its factorization.

5641687 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40320, while the sum is 37.

The square root of 5641687 is about 2375.2235684247. The cubic root of 5641687 is about 178.0203549504.

It can be divided in two parts, 5641 and 687, that added together give a triangular number (6328 = T₁₁₂).

The spelling of 5641687 in words is "five million, six hundred forty-one thousand, six hundred eighty-seven".