163281887 has 4 divisors (see below), whose sum is σ = 164363376. Its totient is φ = 162200400.

The previous prime is 163281863. The next prime is 163281907. The reversal of 163281887 is 788182361.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 163281887 - 2⁸ = 163281631 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 (163221887) 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, 540518 + ... + 540819.

It is an arithmetic number, because the mean of its divisors is an integer number (41090844).

Almost surely, 2^163281887 is an apocalyptic number.

163281887 is a deficient number, since it is larger than the sum of its proper divisors (1081489).

163281887 is a wasteful number, since it uses less digits than its factorization.

163281887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1081488.

The product of its digits is 129024, while the sum is 44.

The square root of 163281887 is about 12778.1801129895. The cubic root of 163281887 is about 546.5702680921.

The spelling of 163281887 in words is "one hundred sixty-three million, two hundred eighty-one thousand, eight hundred eighty-seven".