163919 has 4 divisors (see below), whose sum is σ = 187344. Its totient is φ = 140496.

The previous prime is 163909. The next prime is 163927. The reversal of 163919 is 919361.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 919361 = 829 ⋅1109.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-163919 is a prime.

It is a super-2 number, since 2×163919² = 53738877122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 163891 and 163900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11702 + ... + 11715.

It is an arithmetic number, because the mean of its divisors is an integer number (46836).

2¹⁶³⁹¹⁹ is an apocalyptic number.

163919 is a deficient number, since it is larger than the sum of its proper divisors (23425).

163919 is an equidigital number, since it uses as much as digits as its factorization.

163919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23424.

The product of its digits is 1458, while the sum is 29.

The square root of 163919 is about 404.8691146531. The cubic root of 163919 is about 54.7280236786.

The spelling of 163919 in words is "one hundred sixty-three thousand, nine hundred nineteen".