678459983 has 4 divisors (see below), whose sum is σ = 678891240. Its totient is φ = 678028728.

The previous prime is 678459967. The next prime is 678459997. The reversal of 678459983 is 389954876.

678459983 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 is a cyclic number.

It is not a de Polignac number, because 678459983 - 2⁴ = 678459967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678459913) 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, 213260 + ... + 216417.

It is an arithmetic number, because the mean of its divisors is an integer number (169722810).

Almost surely, 2^678459983 is an apocalyptic number.

678459983 is a deficient number, since it is larger than the sum of its proper divisors (431257).

678459983 is a wasteful number, since it uses less digits than its factorization.

678459983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431256.

The product of its digits is 13063680, while the sum is 59.

The square root of 678459983 is about 26047.2644053075. The cubic root of 678459983 is about 878.7015902625.

The spelling of 678459983 in words is "six hundred seventy-eight million, four hundred fifty-nine thousand, nine hundred eighty-three".