16320173 has 4 divisors (see below), whose sum is σ = 16718268. Its totient is φ = 15922080.

The previous prime is 16320149. The next prime is 16320181. The reversal of 16320173 is 37102361.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 37102361 = 151 ⋅245711.

It can be written as a sum of positive squares in 2 ways, for example, as 6666724 + 9653449 = 2582^2 + 3107^2 .

It is a cyclic number.

It is not a de Polignac number, because 16320173 - 2¹² = 16316077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16320103) 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, 198986 + ... + 199067.

It is an arithmetic number, because the mean of its divisors is an integer number (4179567).

Almost surely, 2^16320173 is an apocalyptic number.

It is an amenable number.

16320173 is a deficient number, since it is larger than the sum of its proper divisors (398095).

16320173 is an equidigital number, since it uses as much as digits as its factorization.

16320173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398094.

The product of its (nonzero) digits is 756, while the sum is 23.

The square root of 16320173 is about 4039.8233872287. The cubic root of 16320173 is about 253.6539244944.

The spelling of 16320173 in words is "sixteen million, three hundred twenty thousand, one hundred seventy-three".