161383 has 4 divisors (see below), whose sum is σ = 163728. Its totient is φ = 159040.

The previous prime is 161377. The next prime is 161387. The reversal of 161383 is 383161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 383161 = 619².

It is not a de Polignac number, because 161383 - 2¹³ = 153191 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161387) 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, 1066 + ... + 1207.

It is an arithmetic number, because the mean of its divisors is an integer number (40932).

2¹⁶¹³⁸³ is an apocalyptic number.

161383 is a deficient number, since it is larger than the sum of its proper divisors (2345).

161383 is an equidigital number, since it uses as much as digits as its factorization.

161383 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2344.

The product of its digits is 432, while the sum is 22.

The square root of 161383 is about 401.7250303379. The cubic root of 161383 is about 54.4443221186. Note that the first 3 decimals are identical.

The spelling of 161383 in words is "one hundred sixty-one thousand, three hundred eighty-three".