281068889 has 4 divisors (see below), whose sum is σ = 282137856. Its totient is φ = 279999924.

The previous prime is 281068877. The next prime is 281068891. The reversal of 281068889 is 988860182.

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 281068889 - 2¹² = 281064793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (281068189) 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 in 3 ways as a sum of consecutive naturals, for example, 534089 + ... + 534614.

It is an arithmetic number, because the mean of its divisors is an integer number (70534464).

Almost surely, 2^281068889 is an apocalyptic number.

It is an amenable number.

281068889 is a deficient number, since it is larger than the sum of its proper divisors (1068967).

281068889 is a wasteful number, since it uses less digits than its factorization.

281068889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1068966.

The product of its (nonzero) digits is 442368, while the sum is 50.

The square root of 281068889 is about 16765.1092749197. The cubic root of 281068889 is about 655.0446827704.

The spelling of 281068889 in words is "two hundred eighty-one million, sixty-eight thousand, eight hundred eighty-nine".