678494543 has 2 divisors, whose sum is σ = 678494544. Its totient is φ = 678494542.

The previous prime is 678494507. The next prime is 678494573. The reversal of 678494543 is 345494876.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 678494543 - 2¹⁴ = 678478159 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 678494491 and 678494500.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (678494573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339247271 + 339247272.

It is an arithmetic number, because the mean of its divisors is an integer number (339247272).

Almost surely, 2^678494543 is an apocalyptic number.

678494543 is a deficient number, since it is larger than the sum of its proper divisors (1).

678494543 is an equidigital number, since it uses as much as digits as its factorization.

678494543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2903040, while the sum is 50.

The square root of 678494543 is about 26047.9278062574. The cubic root of 678494543 is about 878.7165100377.

The spelling of 678494543 in words is "six hundred seventy-eight million, four hundred ninety-four thousand, five hundred forty-three".