678211 has 2 divisors, whose sum is σ = 678212. Its totient is φ = 678210.

The previous prime is 678203. The next prime is 678217. The reversal of 678211 is 112876.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 678211 - 2³ = 678203 is a prime.

It is not a weakly prime, because it can be changed into another prime (678217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339105 + 339106.

It is an arithmetic number, because the mean of its divisors is an integer number (339106).

2⁶⁷⁸²¹¹ is an apocalyptic number.

678211 is a deficient number, since it is larger than the sum of its proper divisors (1).

678211 is an equidigital number, since it uses as much as digits as its factorization.

678211 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 672, while the sum is 25.

The square root of 678211 is about 823.5356701443. The cubic root of 678211 is about 87.8594087717.

The spelling of 678211 in words is "six hundred seventy-eight thousand, two hundred eleven".