678579 has 8 divisors (see below), whose sum is σ = 987072. Its totient is φ = 411240.

The previous prime is 678577. The next prime is 678581. The reversal of 678579 is 975876.

It is an interprime number because it is at equal distance from previous prime (678577) and next prime (678581).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 678579 - 2¹ = 678577 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 678579.

It is not an unprimeable number, because it can be changed into a prime (678577) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10249 + ... + 10314.

It is an arithmetic number, because the mean of its divisors is an integer number (123384).

2⁶⁷⁸⁵⁷⁹ is an apocalyptic number.

678579 is a deficient number, since it is larger than the sum of its proper divisors (308493).

678579 is a wasteful number, since it uses less digits than its factorization.

678579 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20577.

The product of its digits is 105840, while the sum is 42.

The square root of 678579 is about 823.7590667179. The cubic root of 678579 is about 87.8752968538.

It can be divided in two parts, 67 and 8579, that added together give a triangular number (8646 = T₁₃₁).

The spelling of 678579 in words is "six hundred seventy-eight thousand, five hundred seventy-nine".