68393 has 4 divisors (see below), whose sum is σ = 73668. Its totient is φ = 63120.

The previous prime is 68389. The next prime is 68399. The reversal of 68393 is 39386.

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

It can be written as a sum of positive squares in 2 ways, for example, as 29584 + 38809 = 172^2 + 197^2 .

It is a cyclic number.

It is not a de Polignac number, because 68393 - 2² = 68389 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2618 + ... + 2643.

It is an arithmetic number, because the mean of its divisors is an integer number (18417).

2⁶⁸³⁹³ is an apocalyptic number.

It is an amenable number.

68393 is a deficient number, since it is larger than the sum of its proper divisors (5275).

68393 is a wasteful number, since it uses less digits than its factorization.

68393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5274.

The product of its digits is 3888, while the sum is 29.

The square root of 68393 is about 261.5205536856. The cubic root of 68393 is about 40.8950319067.

The spelling of 68393 in words is "sixty-eight thousand, three hundred ninety-three".