163653 has 8 divisors (see below), whose sum is σ = 249408. Its totient is φ = 93504.

The previous prime is 163643. The next prime is 163661. The reversal of 163653 is 356361.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 163653 - 2⁴ = 163637 is a prime.

It is an Ulam number.

It is a Curzon number.

163653 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3876 + ... + 3917.

It is an arithmetic number, because the mean of its divisors is an integer number (31176).

2¹⁶³⁶⁵³ is an apocalyptic number.

It is an amenable number.

163653 is a deficient number, since it is larger than the sum of its proper divisors (85755).

163653 is an equidigital number, since it uses as much as digits as its factorization.

163653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7803.

The product of its digits is 1620, while the sum is 24.

The square root of 163653 is about 404.5404800511. The cubic root of 163653 is about 54.6984043018.

The spelling of 163653 in words is "one hundred sixty-three thousand, six hundred fifty-three".