281443093 has 2 divisors, whose sum is σ = 281443094. Its totient is φ = 281443092.

The previous prime is 281443051. The next prime is 281443121. The reversal of 281443093 is 390344182.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 264485169 + 16957924 = 16263^2 + 4118^2 .

It is a cyclic number.

It is not a de Polignac number, because 281443093 - 2²⁵ = 247888661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (281443033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140721546 + 140721547.

It is an arithmetic number, because the mean of its divisors is an integer number (140721547).

Almost surely, 2^281443093 is an apocalyptic number.

It is an amenable number.

281443093 is a deficient number, since it is larger than the sum of its proper divisors (1).

281443093 is an equidigital number, since it uses as much as digits as its factorization.

281443093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 281443093 is about 16776.2657644662. The cubic root of 281443093 is about 655.3352540494.

The spelling of 281443093 in words is "two hundred eighty-one million, four hundred forty-three thousand, ninety-three".