678632147 has 4 divisors (see below), whose sum is σ = 684858240. Its totient is φ = 672406056.

The previous prime is 678632099. The next prime is 678632159. The reversal of 678632147 is 741236876.

678632147 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 678632147 - 2¹² = 678628051 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 678632098 and 678632107.

It is not an unprimeable number, because it can be changed into a prime (678632447) 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, 3112883 + ... + 3113100.

It is an arithmetic number, because the mean of its divisors is an integer number (171214560).

Almost surely, 2^678632147 is an apocalyptic number.

678632147 is a deficient number, since it is larger than the sum of its proper divisors (6226093).

678632147 is a wasteful number, since it uses less digits than its factorization.

678632147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6226092.

The product of its digits is 338688, while the sum is 44.

The square root of 678632147 is about 26050.5690340921. The cubic root of 678632147 is about 878.7759095493.

The spelling of 678632147 in words is "six hundred seventy-eight million, six hundred thirty-two thousand, one hundred forty-seven".