84409871 has 16 divisors (see below), whose sum is σ = 104290368. Its totient is φ = 66528000.

The previous prime is 84409861. The next prime is 84409877. The reversal of 84409871 is 17890448.

It is a happy number.

It is not a de Polignac number, because 84409871 - 2²² = 80215567 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84409877) 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, 23921 + ... + 27221.

It is an arithmetic number, because the mean of its divisors is an integer number (6518148).

Almost surely, 2^84409871 is an apocalyptic number.

84409871 is a deficient number, since it is larger than the sum of its proper divisors (19880497).

84409871 is a wasteful number, since it uses less digits than its factorization.

84409871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3602.

The product of its (nonzero) digits is 64512, while the sum is 41.

The square root of 84409871 is about 9187.4844761774. The cubic root of 84409871 is about 438.6630751788.

The spelling of 84409871 in words is "eighty-four million, four hundred nine thousand, eight hundred seventy-one".