678589633 has 4 divisors (see below), whose sum is σ = 683542980. Its totient is φ = 673636288.

The previous prime is 678589577. The next prime is 678589643. The reversal of 678589633 is 336985876.

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

It can be written as a sum of positive squares in 2 ways, for example, as 130233744 + 548355889 = 11412^2 + 23417^2 .

It is a cyclic number.

It is not a de Polignac number, because 678589633 - 2²⁵ = 645035201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (678589643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2476468 + ... + 2476741.

It is an arithmetic number, because the mean of its divisors is an integer number (170885745).

Almost surely, 2^678589633 is an apocalyptic number.

It is an amenable number.

678589633 is a deficient number, since it is larger than the sum of its proper divisors (4953347).

678589633 is a wasteful number, since it uses less digits than its factorization.

678589633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4953346.

The product of its digits is 6531840, while the sum is 55.

The square root of 678589633 is about 26049.7530314589. The cubic root of 678589633 is about 878.7575583904.

The spelling of 678589633 in words is "six hundred seventy-eight million, five hundred eighty-nine thousand, six hundred thirty-three".