678199 has 2 divisors, whose sum is σ = 678200. Its totient is φ = 678198.

The previous prime is 678191. The next prime is 678203. The reversal of 678199 is 991876.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 678199 - 2³ = 678191 is a prime.

678199 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (678191) by changing a digit.

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

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339099 + 339100.

It is an arithmetic number, because the mean of its divisors is an integer number (339100).

2⁶⁷⁸¹⁹⁹ is an apocalyptic number.

678199 is a deficient number, since it is larger than the sum of its proper divisors (1).

678199 is an equidigital number, since it uses as much as digits as its factorization.

678199 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27216, while the sum is 40.

The square root of 678199 is about 823.5283844531. The cubic root of 678199 is about 87.8588905853.

The spelling of 678199 in words is "six hundred seventy-eight thousand, one hundred ninety-nine".