678193 has 4 divisors (see below), whose sum is σ = 686448. Its totient is φ = 669940.

The previous prime is 678191. The next prime is 678199. The reversal of 678193 is 391876.

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 678193 - 2¹ = 678191 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (678191) 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, 4003 + ... + 4168.

It is an arithmetic number, because the mean of its divisors is an integer number (171612).

2⁶⁷⁸¹⁹³ is an apocalyptic number.

It is an amenable number.

678193 is a deficient number, since it is larger than the sum of its proper divisors (8255).

678193 is an equidigital number, since it uses as much as digits as its factorization.

678193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8254.

The product of its digits is 9072, while the sum is 34.

The square root of 678193 is about 823.5247415834. The cubic root of 678193 is about 87.8586314898.

The spelling of 678193 in words is "six hundred seventy-eight thousand, one hundred ninety-three".