84784863 has 16 divisors (see below), whose sum is σ = 117317376. Its totient is φ = 54425280.

The previous prime is 84784853. The next prime is 84784879. The reversal of 84784863 is 36848748.

It is not a de Polignac number, because 84784863 - 2¹⁸ = 84522719 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84784813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4531 + ... + 13787.

It is an arithmetic number, because the mean of its divisors is an integer number (7332336).

Almost surely, 2^84784863 is an apocalyptic number.

84784863 is a deficient number, since it is larger than the sum of its proper divisors (32532513).

84784863 is a wasteful number, since it uses less digits than its factorization.

84784863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9374.

The product of its digits is 1032192, while the sum is 48.

The square root of 84784863 is about 9207.8696233168. The cubic root of 84784863 is about 439.3117045027.

It can be divided in two parts, 8 and 4784863, that added together give a triangular number (4784871 = T₃₀₉₃).

The spelling of 84784863 in words is "eighty-four million, seven hundred eighty-four thousand, eight hundred sixty-three".