163647 has 32 divisors (see below), whose sum is σ = 288000. Its totient is φ = 90720.

The previous prime is 163643. The next prime is 163661. The reversal of 163647 is 746361.

163647 is a `hidden beast` number, since 16 + 3 + 647 = 666.

It is not a de Polignac number, because 163647 - 2² = 163643 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

163647 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 163647.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163643) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5629 + ... + 5657.

It is an arithmetic number, because the mean of its divisors is an integer number (9000).

2¹⁶³⁶⁴⁷ is an apocalyptic number.

163647 is a deficient number, since it is larger than the sum of its proper divisors (124353).

163647 is a wasteful number, since it uses less digits than its factorization.

163647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68 (or 62 counting only the distinct ones).

The product of its digits is 3024, while the sum is 27.

The square root of 163647 is about 404.5330641616. The cubic root of 163647 is about 54.6977358255.

It can be divided in two parts, 16 and 3647, that added together give a palindrome (3663).

The spelling of 163647 in words is "one hundred sixty-three thousand, six hundred forty-seven".