161373 has 4 divisors (see below), whose sum is σ = 215168. Its totient is φ = 107580.

The previous prime is 161363. The next prime is 161377. The reversal of 161373 is 373161.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 161373 - 2⁵ = 161341 is a prime.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161377) 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 3 ways as a sum of consecutive naturals, for example, 26893 + ... + 26898.

It is an arithmetic number, because the mean of its divisors is an integer number (53792).

2¹⁶¹³⁷³ is an apocalyptic number.

It is an amenable number.

161373 is a deficient number, since it is larger than the sum of its proper divisors (53795).

161373 is an equidigital number, since it uses as much as digits as its factorization.

161373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53794.

The product of its digits is 378, while the sum is 21.

The square root of 161373 is about 401.7125838208. The cubic root of 161373 is about 54.4431975589.

Multiplying 161373 by its sum of digits (21), we get a palindrome (3388833).

The spelling of 161373 in words is "one hundred sixty-one thousand, three hundred seventy-three".