678512289 has 16 divisors (see below), whose sum is σ = 1113456512. Its totient is φ = 357896448.

The previous prime is 678512251. The next prime is 678512311. The reversal of 678512289 is 982215876.

It is not a de Polignac number, because 678512289 - 2⁸ = 678512033 is a prime.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (678512389) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1242424 + ... + 1242969.

It is an arithmetic number, because the mean of its divisors is an integer number (69591032).

Almost surely, 2^678512289 is an apocalyptic number.

It is an amenable number.

678512289 is a deficient number, since it is larger than the sum of its proper divisors (434944223).

678512289 is a wasteful number, since it uses less digits than its factorization.

678512289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2485416.

The product of its digits is 483840, while the sum is 48.

The square root of 678512289 is about 26048.2684453305. The cubic root of 678512289 is about 878.7241709037.

The spelling of 678512289 in words is "six hundred seventy-eight million, five hundred twelve thousand, two hundred eighty-nine".