678649059 has 12 divisors (see below), whose sum is σ = 1069386552. Its totient is φ = 411302400.

The previous prime is 678649051. The next prime is 678649073. The reversal of 678649059 is 950946876.

It is not a de Polignac number, because 678649059 - 2³ = 678649051 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 678648996 and 678649014.

It is not an unprimeable number, because it can be changed into a prime (678649051) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3427422 + ... + 3427619.

It is an arithmetic number, because the mean of its divisors is an integer number (89115546).

Almost surely, 2^678649059 is an apocalyptic number.

678649059 is a deficient number, since it is larger than the sum of its proper divisors (390737493).

678649059 is a wasteful number, since it uses less digits than its factorization.

678649059 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6855058 (or 6855055 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 54.

The square root of 678649059 is about 26050.8936315052. The cubic root of 678649059 is about 878.7832093974.

The spelling of 678649059 in words is "six hundred seventy-eight million, six hundred forty-nine thousand, fifty-nine".