678607 has 2 divisors, whose sum is σ = 678608. Its totient is φ = 678606.

The previous prime is 678599. The next prime is 678611. The reversal of 678607 is 706876.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 678607 - 2³ = 678599 is a prime.

678607 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (678637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339303 + 339304.

It is an arithmetic number, because the mean of its divisors is an integer number (339304).

2⁶⁷⁸⁶⁰⁷ is an apocalyptic number.

678607 is a deficient number, since it is larger than the sum of its proper divisors (1).

678607 is an equidigital number, since it uses as much as digits as its factorization.

678607 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14112, while the sum is 34.

The square root of 678607 is about 823.7760618032. The cubic root of 678607 is about 87.8765054945.

The spelling of 678607 in words is "six hundred seventy-eight thousand, six hundred seven".