678000047 has 4 divisors (see below), whose sum is σ = 713684280. Its totient is φ = 642315816.

The previous prime is 678000031. The next prime is 678000053. The reversal of 678000047 is 740000876.

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 678000047 - 2⁴ = 678000031 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 677999977 and 678000022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678000007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17842088 + ... + 17842125.

It is an arithmetic number, because the mean of its divisors is an integer number (178421070).

Almost surely, 2^678000047 is an apocalyptic number.

678000047 is a deficient number, since it is larger than the sum of its proper divisors (35684233).

678000047 is a wasteful number, since it uses less digits than its factorization.

678000047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35684232.

The product of its (nonzero) digits is 9408, while the sum is 32.

The square root of 678000047 is about 26038.4340350951. The cubic root of 678000047 is about 878.5029846634.

The spelling of 678000047 in words is "six hundred seventy-eight million, forty-seven", and thus it is an aban number.