84678563 has 2 divisors, whose sum is σ = 84678564. Its totient is φ = 84678562.

The previous prime is 84678499. The next prime is 84678589. The reversal of 84678563 is 36587648.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 84678563 - 2⁶ = 84678499 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (84678593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42339281 + 42339282.

It is an arithmetic number, because the mean of its divisors is an integer number (42339282).

Almost surely, 2^84678563 is an apocalyptic number.

84678563 is a deficient number, since it is larger than the sum of its proper divisors (1).

84678563 is an equidigital number, since it uses as much as digits as its factorization.

84678563 is an evil number, because the sum of its binary digits is even.

The product of its digits is 967680, while the sum is 47.

The square root of 84678563 is about 9202.0955765521. The cubic root of 84678563 is about 439.1280303477.

The spelling of 84678563 in words is "eighty-four million, six hundred seventy-eight thousand, five hundred sixty-three".