878705543 has 2 divisors, whose sum is σ = 878705544. Its totient is φ = 878705542.

The previous prime is 878705461. The next prime is 878705557. The reversal of 878705543 is 345507878.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 878705543 - 2¹⁸ = 878443399 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (878705573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 439352771 + 439352772.

It is an arithmetic number, because the mean of its divisors is an integer number (439352772).

Almost surely, 2^878705543 is an apocalyptic number.

878705543 is a deficient number, since it is larger than the sum of its proper divisors (1).

878705543 is an equidigital number, since it uses as much as digits as its factorization.

878705543 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 940800, while the sum is 47.

The square root of 878705543 is about 29642.9678507399. The cubic root of 878705543 is about 957.8138706099.

The spelling of 878705543 in words is "eight hundred seventy-eight million, seven hundred five thousand, five hundred forty-three".