84419871 has 4 divisors (see below), whose sum is σ = 112559832. Its totient is φ = 56279912.

The previous prime is 84419837. The next prime is 84419873. The reversal of 84419871 is 17891448.

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 84419871 - 2⁹ = 84419359 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84419873) 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 3 ways as a sum of consecutive naturals, for example, 14069976 + ... + 14069981.

It is an arithmetic number, because the mean of its divisors is an integer number (28139958).

Almost surely, 2^84419871 is an apocalyptic number.

84419871 is a deficient number, since it is larger than the sum of its proper divisors (28139961).

84419871 is a wasteful number, since it uses less digits than its factorization.

84419871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28139960.

The product of its digits is 64512, while the sum is 42.

The square root of 84419871 is about 9188.0286786666. The cubic root of 84419871 is about 438.6803972348.

The spelling of 84419871 in words is "eighty-four million, four hundred nineteen thousand, eight hundred seventy-one".