163787 has 8 divisors (see below), whose sum is σ = 181104. Its totient is φ = 147168.

The previous prime is 163781. The next prime is 163789. The reversal of 163787 is 787361.

It is a happy number.

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 163787 - 2⁴ = 163771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 413 + ... + 705.

It is an arithmetic number, because the mean of its divisors is an integer number (22638).

2¹⁶³⁷⁸⁷ is an apocalyptic number.

163787 is a deficient number, since it is larger than the sum of its proper divisors (17317).

163787 is a wasteful number, since it uses less digits than its factorization.

163787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349.

The product of its digits is 7056, while the sum is 32.

The square root of 163787 is about 404.7060661764. The cubic root of 163787 is about 54.7133293497.

The spelling of 163787 in words is "one hundred sixty-three thousand, seven hundred eighty-seven".