281968087 has 8 divisors (see below), whose sum is σ = 288222912. Its totient is φ = 275724000.

The previous prime is 281968081. The next prime is 281968091. The reversal of 281968087 is 780869182.

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 281968087 - 2³ = 281968079 is a prime.

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 281968087.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (281968081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74337 + ... + 78037.

It is an arithmetic number, because the mean of its divisors is an integer number (36027864).

Almost surely, 2^281968087 is an apocalyptic number.

281968087 is a deficient number, since it is larger than the sum of its proper divisors (6254825).

281968087 is a wasteful number, since it uses less digits than its factorization.

281968087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5369.

The product of its (nonzero) digits is 387072, while the sum is 49.

The square root of 281968087 is about 16791.9054011151. The cubic root of 281968087 is about 655.7424806870.

The spelling of 281968087 in words is "two hundred eighty-one million, nine hundred sixty-eight thousand, eighty-seven".