84664863 has 18 divisors (see below), whose sum is σ = 127849176. Its totient is φ = 53986152.

The previous prime is 84664841. The next prime is 84664883. The reversal of 84664863 is 36846648.

It is not a de Polignac number, because 84664863 - 2¹⁸ = 84402719 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84664883) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 4131 + ... + 13652.

It is an arithmetic number, because the mean of its divisors is an integer number (7102732).

Almost surely, 2^84664863 is an apocalyptic number.

84664863 is a deficient number, since it is larger than the sum of its proper divisors (43184313).

84664863 is a wasteful number, since it uses less digits than its factorization.

84664863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17835 (or 17809 counting only the distinct ones).

The product of its digits is 663552, while the sum is 45.

The square root of 84664863 is about 9201.3511507822. The cubic root of 84664863 is about 439.1043471459.

The spelling of 84664863 in words is "eighty-four million, six hundred sixty-four thousand, eight hundred sixty-three".