678458503 has 2 divisors, whose sum is σ = 678458504. Its totient is φ = 678458502.

The previous prime is 678458477. The next prime is 678458513. The reversal of 678458503 is 305854876.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 678458503 - 2⁵ = 678458471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (678458513) 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, 339229251 + 339229252.

It is an arithmetic number, because the mean of its divisors is an integer number (339229252).

Almost surely, 2^678458503 is an apocalyptic number.

678458503 is a deficient number, since it is larger than the sum of its proper divisors (1).

678458503 is an equidigital number, since it uses as much as digits as its factorization.

678458503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 806400, while the sum is 46.

The square root of 678458503 is about 26047.2359953988. The cubic root of 678458503 is about 878.7009513256.

The spelling of 678458503 in words is "six hundred seventy-eight million, four hundred fifty-eight thousand, five hundred three".