5661143 has 2 divisors, whose sum is σ = 5661144. Its totient is φ = 5661142.

The previous prime is 5661121. The next prime is 5661163. The reversal of 5661143 is 3411665.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 5661143 - 2¹⁸ = 5398999 is a prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5661113) 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, 2830571 + 2830572.

It is an arithmetic number, because the mean of its divisors is an integer number (2830572).

Almost surely, 2^5661143 is an apocalyptic number.

5661143 is a deficient number, since it is larger than the sum of its proper divisors (1).

5661143 is an equidigital number, since it uses as much as digits as its factorization.

5661143 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2160, while the sum is 26.

The square root of 5661143 is about 2379.3156579151. The cubic root of 5661143 is about 178.2247613119.

The spelling of 5661143 in words is "five million, six hundred sixty-one thousand, one hundred forty-three".