678950507 has 2 divisors, whose sum is σ = 678950508. Its totient is φ = 678950506.

The previous prime is 678950423. The next prime is 678950513. The reversal of 678950507 is 705059876.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-678950507 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (678952507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339475253 + 339475254.

It is an arithmetic number, because the mean of its divisors is an integer number (339475254).

Almost surely, 2^678950507 is an apocalyptic number.

678950507 is a deficient number, since it is larger than the sum of its proper divisors (1).

678950507 is an equidigital number, since it uses as much as digits as its factorization.

678950507 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 529200, while the sum is 47.

The square root of 678950507 is about 26056.6787407758. The cubic root of 678950507 is about 878.9133052224.

The spelling of 678950507 in words is "six hundred seventy-eight million, nine hundred fifty thousand, five hundred seven".