678494 has 4 divisors (see below), whose sum is σ = 1017744. Its totient is φ = 339246.

The previous prime is 678493. The next prime is 678499. The reversal of 678494 is 494876.

It is a happy number.

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

It is a super-3 number, since 3×678494³ = 937042500533333352, which contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 169622 + ... + 169625.

It is an arithmetic number, because the mean of its divisors is an integer number (254436).

2⁶⁷⁸⁴⁹⁴ is an apocalyptic number.

678494 is a deficient number, since it is larger than the sum of its proper divisors (339250).

678494 is a wasteful number, since it uses less digits than its factorization.

678494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339249.

The product of its digits is 48384, while the sum is 38.

The square root of 678494 is about 823.7074723468. The cubic root of 678494 is about 87.8716275625.

The spelling of 678494 in words is "six hundred seventy-eight thousand, four hundred ninety-four".