678614 has 4 divisors (see below), whose sum is σ = 1017924. Its totient is φ = 339306.

The previous prime is 678611. The next prime is 678631. The reversal of 678614 is 416876.

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

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678611) 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, 169652 + ... + 169655.

It is an arithmetic number, because the mean of its divisors is an integer number (254481).

2⁶⁷⁸⁶¹⁴ is an apocalyptic number.

678614 is a deficient number, since it is larger than the sum of its proper divisors (339310).

678614 is a wasteful number, since it uses less digits than its factorization.

678614 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339309.

The product of its digits is 8064, while the sum is 32.

The square root of 678614 is about 823.7803105197. The cubic root of 678614 is about 87.8768076494.

The spelling of 678614 in words is "six hundred seventy-eight thousand, six hundred fourteen".