543674561 has 2 divisors, whose sum is σ = 543674562. Its totient is φ = 543674560.

The previous prime is 543674543. The next prime is 543674611. The reversal of 543674561 is 165476345.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 347114161 + 196560400 = 18631^2 + 14020^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-543674561 is a prime.

It is a Chen prime.

It is an alternating number because its digits alternate between odd and even.

It is not a weakly prime, because it can be changed into another prime (543673561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271837280 + 271837281.

It is an arithmetic number, because the mean of its divisors is an integer number (271837281).

Almost surely, 2^543674561 is an apocalyptic number.

It is an amenable number.

543674561 is a deficient number, since it is larger than the sum of its proper divisors (1).

543674561 is an equidigital number, since it uses as much as digits as its factorization.

543674561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 302400, while the sum is 41.

The square root of 543674561 is about 23316.8299946627. The cubic root of 543674561 is about 816.1682024023.

It can be divided in two parts, 5436 and 74561, that added together give a palindrome (79997).

The spelling of 543674561 in words is "five hundred forty-three million, six hundred seventy-four thousand, five hundred sixty-one".