319663 has 4 divisors (see below), whose sum is σ = 321048. Its totient is φ = 318280.

The previous prime is 319639. The next prime is 319673. The reversal of 319663 is 366913.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 366913 = 163 ⋅2251.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-319663 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 (319673) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 253 + ... + 838.

It is an arithmetic number, because the mean of its divisors is an integer number (80262).

2³¹⁹⁶⁶³ is an apocalyptic number.

319663 is a deficient number, since it is larger than the sum of its proper divisors (1385).

319663 is a wasteful number, since it uses less digits than its factorization.

319663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1384.

The product of its digits is 2916, while the sum is 28.

The square root of 319663 is about 565.3874777531. The cubic root of 319663 is about 68.3750185211.

The spelling of 319663 in words is "three hundred nineteen thousand, six hundred sixty-three".