678599 has 2 divisors, whose sum is σ = 678600. Its totient is φ = 678598.

The previous prime is 678593. The next prime is 678607. The reversal of 678599 is 995876.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 678599 - 2⁸ = 678343 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (678593) 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 as a sum of consecutive naturals, namely, 339299 + 339300.

It is an arithmetic number, because the mean of its divisors is an integer number (339300).

2⁶⁷⁸⁵⁹⁹ is an apocalyptic number.

678599 is a deficient number, since it is larger than the sum of its proper divisors (1).

678599 is an equidigital number, since it uses as much as digits as its factorization.

678599 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 136080, while the sum is 44.

The square root of 678599 is about 823.7712061003. The cubic root of 678599 is about 87.8761601720.

The spelling of 678599 in words is "six hundred seventy-eight thousand, five hundred ninety-nine".