84870171 has 12 divisors (see below), whose sum is σ = 129801672. Its totient is φ = 53251776.

The previous prime is 84870127. The next prime is 84870179. The reversal of 84870171 is 17107848.

84870171 is a `hidden beast` number, since 8 + 487 + 0 + 171 = 666.

It is not a de Polignac number, because 84870171 - 2²² = 80675867 is a prime.

It is not an unprimeable number, because it can be changed into a prime (84870179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 277201 + ... + 277506.

It is an arithmetic number, because the mean of its divisors is an integer number (10816806).

Almost surely, 2^84870171 is an apocalyptic number.

84870171 is a deficient number, since it is larger than the sum of its proper divisors (44931501).

84870171 is a wasteful number, since it uses less digits than its factorization.

84870171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 554730 (or 554727 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 36.

The square root of 84870171 is about 9212.5008005427. The cubic root of 84870171 is about 439.4589958911.

The spelling of 84870171 in words is "eighty-four million, eight hundred seventy thousand, one hundred seventy-one".