281084873 has 4 divisors (see below), whose sum is σ = 284243220. Its totient is φ = 277926528.

The previous prime is 281084857. The next prime is 281084887. The reversal of 281084873 is 378480182.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 378480182 = 2 ⋅189240091.

It can be written as a sum of positive squares in 2 ways, for example, as 109265209 + 171819664 = 10453^2 + 13108^2 .

It is a cyclic number.

It is not a de Polignac number, because 281084873 - 2⁴ = 281084857 is a prime.

It is a super-2 number, since 2×281084873² = 158017411658852258, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 281084873.

It is not an unprimeable number, because it can be changed into a prime (281084833) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1579040 + ... + 1579217.

It is an arithmetic number, because the mean of its divisors is an integer number (71060805).

Almost surely, 2^281084873 is an apocalyptic number.

It is an amenable number.

281084873 is a deficient number, since it is larger than the sum of its proper divisors (3158347).

281084873 is an equidigital number, since it uses as much as digits as its factorization.

281084873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3158346.

The product of its (nonzero) digits is 86016, while the sum is 41.

The square root of 281084873 is about 16765.5859724616. The cubic root of 281084873 is about 655.0570996975.

The spelling of 281084873 in words is "two hundred eighty-one million, eighty-four thousand, eight hundred seventy-three".