678143 has 4 divisors (see below), whose sum is σ = 681408. Its totient is φ = 674880.

The previous prime is 678133. The next prime is 678157. The reversal of 678143 is 341876.

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 678143 - 2¹⁰ = 677119 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 678143.

It is not an unprimeable number, because it can be changed into a prime (678103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1298 + ... + 1743.

It is an arithmetic number, because the mean of its divisors is an integer number (170352).

2⁶⁷⁸¹⁴³ is an apocalyptic number.

678143 is a deficient number, since it is larger than the sum of its proper divisors (3265).

678143 is a wasteful number, since it uses less digits than its factorization.

678143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3264.

The product of its digits is 4032, while the sum is 29.

The square root of 678143 is about 823.4943837088. The cubic root of 678143 is about 87.8564723013.

The spelling of 678143 in words is "six hundred seventy-eight thousand, one hundred forty-three".