678959 has 2 divisors, whose sum is σ = 678960. Its totient is φ = 678958.

The previous prime is 678949. The next prime is 678971. The reversal of 678959 is 959876.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 678959 - 2⁴ = 678943 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a plaindrome in base 12.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (678949) 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, 339479 + 339480.

It is an arithmetic number, because the mean of its divisors is an integer number (339480).

2⁶⁷⁸⁹⁵⁹ is an apocalyptic number.

678959 is a deficient number, since it is larger than the sum of its proper divisors (1).

678959 is an equidigital number, since it uses as much as digits as its factorization.

678959 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 678959 is about 823.9896844014. The cubic root of 678959 is about 87.8916969986.

The spelling of 678959 in words is "six hundred seventy-eight thousand, nine hundred fifty-nine".