281940873 has 4 divisors (see below), whose sum is σ = 375921168. Its totient is φ = 187960580.

The previous prime is 281940863. The next prime is 281940899. The reversal of 281940873 is 378049182.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 281940873 - 2¹³ = 281932681 is a prime.

It is not an unprimeable number, because it can be changed into a prime (281940803) 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, 46990143 + ... + 46990148.

It is an arithmetic number, because the mean of its divisors is an integer number (93980292).

Almost surely, 2^281940873 is an apocalyptic number.

It is an amenable number.

281940873 is a deficient number, since it is larger than the sum of its proper divisors (93980295).

281940873 is an equidigital number, since it uses as much as digits as its factorization.

281940873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93980294.

The product of its (nonzero) digits is 96768, while the sum is 42.

The square root of 281940873 is about 16791.0950506511. The cubic root of 281940873 is about 655.7213837960.

The spelling of 281940873 in words is "two hundred eighty-one million, nine hundred forty thousand, eight hundred seventy-three".