5643161 has 2 divisors, whose sum is σ = 5643162. Its totient is φ = 5643160.

The previous prime is 5643137. The next prime is 5643163. The reversal of 5643161 is 1613465.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3222025 + 2421136 = 1795^2 + 1556^2 .

It is a cyclic number.

It is not a de Polignac number, because 5643161 - 2¹⁸ = 5381017 is a prime.

Together with 5643163, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 5643161.

It is not a weakly prime, because it can be changed into another prime (5643163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2821580 + 2821581.

It is an arithmetic number, because the mean of its divisors is an integer number (2821581).

Almost surely, 2^5643161 is an apocalyptic number.

It is an amenable number.

5643161 is a deficient number, since it is larger than the sum of its proper divisors (1).

5643161 is an equidigital number, since it uses as much as digits as its factorization.

5643161 is an evil number, because the sum of its binary digits is even.

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

The square root of 5643161 is about 2375.5338347412. The cubic root of 5643161 is about 178.0358573556.

The spelling of 5643161 in words is "five million, six hundred forty-three thousand, one hundred sixty-one".