163773 has 12 divisors (see below), whose sum is σ = 244608. Its totient is φ = 105480.

The previous prime is 163771. The next prime is 163781. The reversal of 163773 is 377361.

It is not a de Polignac number, because 163773 - 2¹ = 163771 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

163773 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163771) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15 + ... + 572.

It is an arithmetic number, because the mean of its divisors is an integer number (20384).

2¹⁶³⁷⁷³ is an apocalyptic number.

It is an amenable number.

163773 is a deficient number, since it is larger than the sum of its proper divisors (80835).

163773 is a wasteful number, since it uses less digits than its factorization.

163773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 624 (or 621 counting only the distinct ones).

The product of its digits is 2646, while the sum is 27.

The square root of 163773 is about 404.6887693030. The cubic root of 163773 is about 54.7117703972.

The spelling of 163773 in words is "one hundred sixty-three thousand, seven hundred seventy-three".