543920161 has 2 divisors, whose sum is σ = 543920162. Its totient is φ = 543920160.

The previous prime is 543920159. The next prime is 543920171. The reversal of 543920161 is 161029345.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 543775761 + 144400 = 23319^2 + 380^2 .

It is a cyclic number.

It is not a de Polignac number, because 543920161 - 2¹ = 543920159 is a prime.

Together with 543920159, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (543920101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271960080 + 271960081.

It is an arithmetic number, because the mean of its divisors is an integer number (271960081).

Almost surely, 2^543920161 is an apocalyptic number.

It is an amenable number.

543920161 is a deficient number, since it is larger than the sum of its proper divisors (1).

543920161 is an equidigital number, since it uses as much as digits as its factorization.

543920161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 543920161 is about 23322.0959821368. The cubic root of 543920161 is about 816.2910827358.

It can be divided in two parts, 5439 and 20161, that added together give a square (25600 = 160²).

The spelling of 543920161 in words is "five hundred forty-three million, nine hundred twenty thousand, one hundred sixty-one".