163445 has 8 divisors (see below), whose sum is σ = 198744. Its totient is φ = 129024.

The previous prime is 163433. The next prime is 163469. The reversal of 163445 is 544361.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 5041 + 158404 = 71^2 + 398^2 .

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 163445 - 2¹² = 159349 is a prime.

It is a d-powerful number, because it can be written as 1 + 6² + 4³ + 3⁹ + 4⁸ + 5⁷ .

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 163445.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 317 + ... + 653.

It is an arithmetic number, because the mean of its divisors is an integer number (24843).

2¹⁶³⁴⁴⁵ is an apocalyptic number.

It is an amenable number.

163445 is a deficient number, since it is larger than the sum of its proper divisors (35299).

163445 is an equidigital number, since it uses as much as digits as its factorization.

163445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 439.

The product of its digits is 1440, while the sum is 23.

The square root of 163445 is about 404.2833164997. The cubic root of 163445 is about 54.6752209166.

The spelling of 163445 in words is "one hundred sixty-three thousand, four hundred forty-five".