678907 has 2 divisors, whose sum is σ = 678908. Its totient is φ = 678906.

The previous prime is 678901. The next prime is 678941. The reversal of 678907 is 709876.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 678907 - 2⁷ = 678779 is a prime.

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

It is not a weakly prime, because it can be changed into another prime (678901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339453 + 339454.

It is an arithmetic number, because the mean of its divisors is an integer number (339454).

2⁶⁷⁸⁹⁰⁷ is an apocalyptic number.

678907 is a deficient number, since it is larger than the sum of its proper divisors (1).

678907 is an equidigital number, since it uses as much as digits as its factorization.

678907 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21168, while the sum is 37.

The square root of 678907 is about 823.9581300042. The cubic root of 678907 is about 87.8894531297.

The spelling of 678907 in words is "six hundred seventy-eight thousand, nine hundred seven".