678244207 has 2 divisors, whose sum is σ = 678244208. Its totient is φ = 678244206.

The previous prime is 678244201. The next prime is 678244213. The reversal of 678244207 is 702442876.

It is a balanced prime because it is at equal distance from previous prime (678244201) and next prime (678244213).

It is a cyclic number.

It is not a de Polignac number, because 678244207 - 2¹⁵ = 678211439 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 678244207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (678244201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339122103 + 339122104.

It is an arithmetic number, because the mean of its divisors is an integer number (339122104).

Almost surely, 2^678244207 is an apocalyptic number.

678244207 is a deficient number, since it is larger than the sum of its proper divisors (1).

678244207 is an equidigital number, since it uses as much as digits as its factorization.

678244207 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 150528, while the sum is 40.

The square root of 678244207 is about 26043.1220670641. The cubic root of 678244207 is about 878.6084269107.

The spelling of 678244207 in words is "six hundred seventy-eight million, two hundred forty-four thousand, two hundred seven".