84442771 has 4 divisors (see below), whose sum is σ = 96506032. Its totient is φ = 72379512.

The previous prime is 84442759. The next prime is 84442801. The reversal of 84442771 is 17724448.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 84442771 - 2²¹ = 82345619 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 84442771.

It is not an unprimeable number, because it can be changed into a prime (84442271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6031620 + ... + 6031633.

It is an arithmetic number, because the mean of its divisors is an integer number (24126508).

Almost surely, 2^84442771 is an apocalyptic number.

84442771 is a deficient number, since it is larger than the sum of its proper divisors (12063261).

84442771 is a wasteful number, since it uses less digits than its factorization.

84442771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12063260.

The product of its digits is 50176, while the sum is 37.

The square root of 84442771 is about 9189.2747809607. The cubic root of 84442771 is about 438.7200595906.

The spelling of 84442771 in words is "eighty-four million, four hundred forty-two thousand, seven hundred seventy-one".