281984243 has 2 divisors, whose sum is σ = 281984244. Its totient is φ = 281984242.

The previous prime is 281984237. The next prime is 281984251. The reversal of 281984243 is 342489182.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 281984243 - 2¹⁸ = 281722099 is a prime.

It is a super-2 number, since 2×281984243² = 159030226600566098, which contains 22 as substring.

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 281984243.

It is not a weakly prime, because it can be changed into another prime (281984293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140992121 + 140992122.

It is an arithmetic number, because the mean of its divisors is an integer number (140992122).

Almost surely, 2^281984243 is an apocalyptic number.

281984243 is a deficient number, since it is larger than the sum of its proper divisors (1).

281984243 is an equidigital number, since it uses as much as digits as its factorization.

281984243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 110592, while the sum is 41.

The square root of 281984243 is about 16792.3864593452. The cubic root of 281984243 is about 655.7550045312.

The spelling of 281984243 in words is "two hundred eighty-one million, nine hundred eighty-four thousand, two hundred forty-three".