678960947 has 4 divisors (see below), whose sum is σ = 775955376. Its totient is φ = 581966520.

The previous prime is 678960941. The next prime is 678960949. The reversal of 678960947 is 749069876.

678960947 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 678960947 - 2¹⁶ = 678895411 is a prime.

It is a super-2 number, since 2×678960947² = 921975935102273618, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 678960892 and 678960901.

It is not an unprimeable number, because it can be changed into a prime (678960941) 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, 48497204 + ... + 48497217.

It is an arithmetic number, because the mean of its divisors is an integer number (193988844).

Almost surely, 2^678960947 is an apocalyptic number.

678960947 is a deficient number, since it is larger than the sum of its proper divisors (96994429).

678960947 is an equidigital number, since it uses as much as digits as its factorization.

678960947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96994428.

The product of its (nonzero) digits is 4572288, while the sum is 56.

The square root of 678960947 is about 26056.8790725213. The cubic root of 678960947 is about 878.9178101202.

The spelling of 678960947 in words is "six hundred seventy-eight million, nine hundred sixty thousand, nine hundred forty-seven".