678489314 has 4 divisors (see below), whose sum is σ = 1017733974. Its totient is φ = 339244656.

The previous prime is 678489311. The next prime is 678489347. The reversal of 678489314 is 413984876.

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

It can be written as a sum of positive squares in only one way, i.e., 649383289 + 29106025 = 25483^2 + 5395^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (678489311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 169622327 + ... + 169622330.

Almost surely, 2^678489314 is an apocalyptic number.

678489314 is a deficient number, since it is larger than the sum of its proper divisors (339244660).

678489314 is a wasteful number, since it uses less digits than its factorization.

678489314 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339244659.

The product of its digits is 1161216, while the sum is 50.

The square root of 678489314 is about 26047.8274333964. The cubic root of 678489314 is about 878.7142526772.

The spelling of 678489314 in words is "six hundred seventy-eight million, four hundred eighty-nine thousand, three hundred fourteen".