281996087 has 8 divisors (see below), whose sum is σ = 292501200. Its totient is φ = 271543104.

The previous prime is 281996083. The next prime is 281996089. The reversal of 281996087 is 780699182.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 281996087 - 2² = 281996083 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (281996083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1838 + ... + 23819.

It is an arithmetic number, because the mean of its divisors is an integer number (36562650).

Almost surely, 2^281996087 is an apocalyptic number.

281996087 is a deficient number, since it is larger than the sum of its proper divisors (10505113).

281996087 is a wasteful number, since it uses less digits than its factorization.

281996087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26065.

The product of its (nonzero) digits is 435456, while the sum is 50.

The square root of 281996087 is about 16792.7391154630. The cubic root of 281996087 is about 655.7641854858.

The spelling of 281996087 in words is "two hundred eighty-one million, nine hundred ninety-six thousand, eighty-seven".