84749871 has 16 divisors (see below), whose sum is σ = 118128384. Its totient is φ = 53944704.

The previous prime is 84749867. The next prime is 84749897. The reversal of 84749871 is 17894748.

It is not a de Polignac number, because 84749871 - 2² = 84749867 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 84749871.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84744871) 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, 64695 + ... + 65991.

It is an arithmetic number, because the mean of its divisors is an integer number (7383024).

Almost surely, 2^84749871 is an apocalyptic number.

84749871 is a deficient number, since it is larger than the sum of its proper divisors (33378513).

84749871 is a wasteful number, since it uses less digits than its factorization.

84749871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2270.

The product of its digits is 451584, while the sum is 48.

The square root of 84749871 is about 9205.9693134401. The cubic root of 84749871 is about 439.2512593166.

The spelling of 84749871 in words is "eighty-four million, seven hundred forty-nine thousand, eight hundred seventy-one".