193913 has 4 divisors (see below), whose sum is σ = 202368. Its totient is φ = 185460.

The previous prime is 193891. The next prime is 193937. The reversal of 193913 is 319391.

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 a cyclic number.

It is not a de Polignac number, because 193913 - 2¹⁰ = 192889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (193943) 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, 4193 + ... + 4238.

It is an arithmetic number, because the mean of its divisors is an integer number (50592).

2¹⁹³⁹¹³ is an apocalyptic number.

It is an amenable number.

193913 is a deficient number, since it is larger than the sum of its proper divisors (8455).

193913 is an equidigital number, since it uses as much as digits as its factorization.

193913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8454.

The product of its digits is 729, while the sum is 26.

The square root of 193913 is about 440.3555381734. The cubic root of 193913 is about 57.8809488262.

It can be divided in two parts, 19 and 3913, that multiplied together give a palindrome (74347).

The spelling of 193913 in words is "one hundred ninety-three thousand, nine hundred thirteen".