163913 has 4 divisors (see below), whose sum is σ = 172560. Its totient is φ = 155268.

The previous prime is 163909. The next prime is 163927. The reversal of 163913 is 319361.

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 163913 - 2² = 163909 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (163973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4295 + ... + 4332.

It is an arithmetic number, because the mean of its divisors is an integer number (43140).

2¹⁶³⁹¹³ is an apocalyptic number.

It is an amenable number.

163913 is a deficient number, since it is larger than the sum of its proper divisors (8647).

163913 is an equidigital number, since it uses as much as digits as its factorization.

163913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8646.

The product of its digits is 486, while the sum is 23.

The square root of 163913 is about 404.8617047833. The cubic root of 163913 is about 54.7273559258.

The spelling of 163913 in words is "one hundred sixty-three thousand, nine hundred thirteen".