281995073 has 4 divisors (see below), whose sum is σ = 285392688. Its totient is φ = 278597460.

The previous prime is 281995069. The next prime is 281995123. The reversal of 281995073 is 370599182.

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, and also an emirpimes, since its reverse is a distinct semiprime: 370599182 = 2 ⋅185299591.

It is a cyclic number.

It is not a de Polignac number, because 281995073 - 2² = 281995069 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (281995013) 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, 1698683 + ... + 1698848.

It is an arithmetic number, because the mean of its divisors is an integer number (71348172).

Almost surely, 2^281995073 is an apocalyptic number.

It is an amenable number.

281995073 is a deficient number, since it is larger than the sum of its proper divisors (3397615).

281995073 is an equidigital number, since it uses as much as digits as its factorization.

281995073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3397614.

The product of its (nonzero) digits is 136080, while the sum is 44.

The square root of 281995073 is about 16792.7089238157. The cubic root of 281995073 is about 655.7633994871.

The spelling of 281995073 in words is "two hundred eighty-one million, nine hundred ninety-five thousand, seventy-three".