678809747 has 16 divisors (see below), whose sum is σ = 846988800. Its totient is φ = 528517440.

The previous prime is 678809701. The next prime is 678809777. The reversal of 678809747 is 747908876.

It is not a de Polignac number, because 678809747 - 2⁶ = 678809683 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 678809692 and 678809701.

It is not an unprimeable number, because it can be changed into a prime (678809777) 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, 121154 + ... + 126632.

It is an arithmetic number, because the mean of its divisors is an integer number (52936800).

Almost surely, 2^678809747 is an apocalyptic number.

678809747 is a deficient number, since it is larger than the sum of its proper divisors (168179053).

678809747 is a wasteful number, since it uses less digits than its factorization.

678809747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7106.

The product of its (nonzero) digits is 4741632, while the sum is 56.

The square root of 678809747 is about 26053.9775658152. The cubic root of 678809747 is about 878.8525622639.

The spelling of 678809747 in words is "six hundred seventy-eight million, eight hundred nine thousand, seven hundred forty-seven".