678371 has 2 divisors, whose sum is σ = 678372. Its totient is φ = 678370.

The previous prime is 678367. The next prime is 678383. The reversal of 678371 is 173876.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 678371 - 2² = 678367 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (678341) 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, 339185 + 339186.

It is an arithmetic number, because the mean of its divisors is an integer number (339186).

2⁶⁷⁸³⁷¹ is an apocalyptic number.

678371 is a deficient number, since it is larger than the sum of its proper divisors (1).

678371 is an equidigital number, since it uses as much as digits as its factorization.

678371 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7056, while the sum is 32.

The square root of 678371 is about 823.6328065346. The cubic root of 678371 is about 87.8663173395.

The spelling of 678371 in words is "six hundred seventy-eight thousand, three hundred seventy-one".