163447 has 4 divisors (see below), whose sum is σ = 165760. Its totient is φ = 161136.

The previous prime is 163433. The next prime is 163469. The reversal of 163447 is 744361.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 744361 = 109 ⋅6829.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-163447 is a prime.

It is a Duffinian number.

163447 is a lucky number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1047 + ... + 1192.

It is an arithmetic number, because the mean of its divisors is an integer number (41440).

2¹⁶³⁴⁴⁷ is an apocalyptic number.

163447 is a deficient number, since it is larger than the sum of its proper divisors (2313).

163447 is an equidigital number, since it uses as much as digits as its factorization.

163447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2312.

The product of its digits is 2016, while the sum is 25.

The square root of 163447 is about 404.2857900050. The cubic root of 163447 is about 54.6754439274.

It can be divided in two parts, 1634 and 47, that added together give a square (1681 = 41²).

The spelling of 163447 in words is "one hundred sixty-three thousand, four hundred forty-seven".