163963 has 4 divisors (see below), whose sum is σ = 165528. Its totient is φ = 162400.

The previous prime is 163927. The next prime is 163973. The reversal of 163963 is 369361.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-163963 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (163973) 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, 613 + ... + 838.

It is an arithmetic number, because the mean of its divisors is an integer number (41382).

2¹⁶³⁹⁶³ is an apocalyptic number.

163963 is a deficient number, since it is larger than the sum of its proper divisors (1565).

163963 is a wasteful number, since it uses less digits than its factorization.

163963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1564.

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

The square root of 163963 is about 404.9234495556. The cubic root of 163963 is about 54.7329200352.

The spelling of 163963 in words is "one hundred sixty-three thousand, nine hundred sixty-three".