678934 has 4 divisors (see below), whose sum is σ = 1018404. Its totient is φ = 339466.

The previous prime is 678907. The next prime is 678941. The reversal of 678934 is 439876.

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

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 678893 and 678902.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 169732 + ... + 169735.

It is an arithmetic number, because the mean of its divisors is an integer number (254601).

2⁶⁷⁸⁹³⁴ is an apocalyptic number.

678934 is a deficient number, since it is larger than the sum of its proper divisors (339470).

678934 is a wasteful number, since it uses less digits than its factorization.

678934 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339469.

The product of its digits is 36288, while the sum is 37.

The square root of 678934 is about 823.9745141690. The cubic root of 678934 is about 87.8906182298.

The spelling of 678934 in words is "six hundred seventy-eight thousand, nine hundred thirty-four".