84889971 has 16 divisors (see below), whose sum is σ = 126004000. Its totient is φ = 56484864.

The previous prime is 84889949. The next prime is 84890009. The reversal of 84889971 is 17998848.

84889971 is a `hidden beast` number, since 8 + 488 + 99 + 71 = 666.

It is not a de Polignac number, because 84889971 - 2¹¹ = 84887923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84889901) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12855 + ... + 18303.

It is an arithmetic number, because the mean of its divisors is an integer number (7875250).

Almost surely, 2^84889971 is an apocalyptic number.

84889971 is a deficient number, since it is larger than the sum of its proper divisors (41114029).

84889971 is a wasteful number, since it uses less digits than its factorization.

84889971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6035 (or 6029 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 54.

The square root of 84889971 is about 9213.5753646454. The cubic root of 84889971 is about 439.4931681311.

The spelling of 84889971 in words is "eighty-four million, eight hundred eighty-nine thousand, nine hundred seventy-one".