84684863 has 2 divisors, whose sum is σ = 84684864. Its totient is φ = 84684862.

The previous prime is 84684793. The next prime is 84684889. The reversal of 84684863 is 36848648.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 84684863 - 2¹⁰ = 84683839 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 (84684893) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42342431 + 42342432.

It is an arithmetic number, because the mean of its divisors is an integer number (42342432).

Almost surely, 2^84684863 is an apocalyptic number.

84684863 is a deficient number, since it is larger than the sum of its proper divisors (1).

84684863 is an equidigital number, since it uses as much as digits as its factorization.

84684863 is an evil number, because the sum of its binary digits is even.

The product of its digits is 884736, while the sum is 47.

The square root of 84684863 is about 9202.4378835176. The cubic root of 84684863 is about 439.1389203057.

It can be divided in two parts, 8468 and 4863, that added together give a palindrome (13331).

The spelling of 84684863 in words is "eighty-four million, six hundred eighty-four thousand, eight hundred sixty-three".