281968283 has 2 divisors, whose sum is σ = 281968284. Its totient is φ = 281968282.

The previous prime is 281968279. The next prime is 281968327. The reversal of 281968283 is 382869182.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 281968283 - 2² = 281968279 is a prime.

It is a super-2 number, since 2×281968283² = 159012225235936178, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (281968483) 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, 140984141 + 140984142.

It is an arithmetic number, because the mean of its divisors is an integer number (140984142).

Almost surely, 2^281968283 is an apocalyptic number.

281968283 is a deficient number, since it is larger than the sum of its proper divisors (1).

281968283 is an equidigital number, since it uses as much as digits as its factorization.

281968283 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 331776, while the sum is 47.

The square root of 281968283 is about 16791.9112372594. The cubic root of 281968283 is about 655.7426326256.

The spelling of 281968283 in words is "two hundred eighty-one million, nine hundred sixty-eight thousand, two hundred eighty-three".