678353 has 4 divisors (see below), whose sum is σ = 730548. Its totient is φ = 626160.

The previous prime is 678343. The next prime is 678367. The reversal of 678353 is 353876.

It is a happy number.

678353 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 82369 + 595984 = 287^2 + 772^2 .

It is a cyclic number.

It is not a de Polignac number, because 678353 - 2⁶ = 678289 is a prime.

It is not an unprimeable number, because it can be changed into a prime (678343) 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, 26078 + ... + 26103.

It is an arithmetic number, because the mean of its divisors is an integer number (182637).

2⁶⁷⁸³⁵³ is an apocalyptic number.

It is an amenable number.

678353 is a deficient number, since it is larger than the sum of its proper divisors (52195).

678353 is a wasteful number, since it uses less digits than its factorization.

678353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52194.

The product of its digits is 15120, while the sum is 32.

The square root of 678353 is about 823.6218792626. The cubic root of 678353 is about 87.8655401798.

The spelling of 678353 in words is "six hundred seventy-eight thousand, three hundred fifty-three".