163917 has 16 divisors (see below), whose sum is σ = 262080. Its totient is φ = 100656.

The previous prime is 163909. The next prime is 163927. The reversal of 163917 is 719361.

It is not a de Polignac number, because 163917 - 2³ = 163909 is a prime.

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

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 163917.

It is not an unprimeable number, because it can be changed into a prime (163927) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 118 + ... + 584.

It is an arithmetic number, because the mean of its divisors is an integer number (16380).

2¹⁶³⁹¹⁷ is an apocalyptic number.

It is an amenable number.

163917 is a deficient number, since it is larger than the sum of its proper divisors (98163).

163917 is a wasteful number, since it uses less digits than its factorization.

163917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 489 (or 483 counting only the distinct ones).

The product of its digits is 1134, while the sum is 27.

The square root of 163917 is about 404.8666447116. The cubic root of 163917 is about 54.7278010962.

The spelling of 163917 in words is "one hundred sixty-three thousand, nine hundred seventeen".