281933 has 2 divisors, whose sum is σ = 281934. Its totient is φ = 281932.

The previous prime is 281927. The next prime is 281947. The reversal of 281933 is 339182.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 252004 + 29929 = 502^2 + 173^2 .

It is a cyclic number.

It is not a de Polignac number, because 281933 - 2¹⁰ = 280909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (281923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140966 + 140967.

It is an arithmetic number, because the mean of its divisors is an integer number (140967).

2²⁸¹⁹³³ is an apocalyptic number.

It is an amenable number.

281933 is a deficient number, since it is larger than the sum of its proper divisors (1).

281933 is an equidigital number, since it uses as much as digits as its factorization.

281933 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296, while the sum is 26.

The square root of 281933 is about 530.9736339970. The cubic root of 281933 is about 65.5715280220.

The spelling of 281933 in words is "two hundred eighty-one thousand, nine hundred thirty-three".