678026747 has 4 divisors (see below), whose sum is σ = 692452896. Its totient is φ = 663600600.

The previous prime is 678026737. The next prime is 678026753. The reversal of 678026747 is 747620876.

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 678026747 - 2⁸ = 678026491 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (47), and also a Moran number because the ratio is a prime number: 14426101 = 678026747 / (6 + 7 + 8 + 0 + 2 + 6 + 7 + 4 + 7).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (678026707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7213004 + ... + 7213097.

It is an arithmetic number, because the mean of its divisors is an integer number (173113224).

Almost surely, 2^678026747 is an apocalyptic number.

678026747 is a deficient number, since it is larger than the sum of its proper divisors (14426149).

678026747 is a wasteful number, since it uses less digits than its factorization.

678026747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14426148.

The product of its (nonzero) digits is 790272, while the sum is 47.

The square root of 678026747 is about 26038.9467336911. The cubic root of 678026747 is about 878.5145164825.

The spelling of 678026747 in words is "six hundred seventy-eight million, twenty-six thousand, seven hundred forty-seven".