678767 has 2 divisors, whose sum is σ = 678768. Its totient is φ = 678766.

The previous prime is 678763. The next prime is 678773. The reversal of 678767 is 767876.

678767 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 678767 - 2² = 678763 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a plaindrome in base 8.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 678767.

It is not a weakly prime, because it can be changed into another prime (678761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339383 + 339384.

It is an arithmetic number, because the mean of its divisors is an integer number (339384).

2⁶⁷⁸⁷⁶⁷ is an apocalyptic number.

678767 is a deficient number, since it is larger than the sum of its proper divisors (1).

678767 is an equidigital number, since it uses as much as digits as its factorization.

678767 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 98784, while the sum is 41.

The square root of 678767 is about 823.8731698508. The cubic root of 678767 is about 87.8834113747.

The spelling of 678767 in words is "six hundred seventy-eight thousand, seven hundred sixty-seven".