193668 has 12 divisors (see below), whose sum is σ = 451920. Its totient is φ = 64552.

The previous prime is 193663. The next prime is 193679. The reversal of 193668 is 866391.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (193663) by changing a digit.

193668 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8058 + ... + 8081.

It is an arithmetic number, because the mean of its divisors is an integer number (37660).

2¹⁹³⁶⁶⁸ is an apocalyptic number.

It is an amenable number.

193668 is an abundant number, since it is smaller than the sum of its proper divisors (258252).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

193668 is a wasteful number, since it uses less digits than its factorization.

193668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16146 (or 16144 counting only the distinct ones).

The product of its digits is 7776, while the sum is 33.

The square root of 193668 is about 440.0772659432. The cubic root of 193668 is about 57.8565619294.

It can be divided in two parts, 193 and 668, that added together give a triangular number (861 = T₄₁).

The spelling of 193668 in words is "one hundred ninety-three thousand, six hundred sixty-eight".