281248673 has 2 divisors, whose sum is σ = 281248674. Its totient is φ = 281248672.

The previous prime is 281248657. The next prime is 281248711. The reversal of 281248673 is 376842182.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 274001809 + 7246864 = 16553^2 + 2692^2 .

It is a cyclic number.

It is not a de Polignac number, because 281248673 - 2⁴ = 281248657 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 281248673.

It is not a weakly prime, because it can be changed into another prime (281248603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140624336 + 140624337.

It is an arithmetic number, because the mean of its divisors is an integer number (140624337).

Almost surely, 2^281248673 is an apocalyptic number.

It is an amenable number.

281248673 is a deficient number, since it is larger than the sum of its proper divisors (1).

281248673 is an equidigital number, since it uses as much as digits as its factorization.

281248673 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 129024, while the sum is 41.

The square root of 281248673 is about 16770.4702677057. The cubic root of 281248673 is about 655.1843181139.

The spelling of 281248673 in words is "two hundred eighty-one million, two hundred forty-eight thousand, six hundred seventy-three".