84871279 has 4 divisors (see below), whose sum is σ = 85695376. Its totient is φ = 84047184.

The previous prime is 84871277. The next prime is 84871289. The reversal of 84871279 is 97217848.

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 84871279 - 2¹ = 84871277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84871277) 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, 411894 + ... + 412099.

It is an arithmetic number, because the mean of its divisors is an integer number (21423844).

Almost surely, 2^84871279 is an apocalyptic number.

84871279 is a deficient number, since it is larger than the sum of its proper divisors (824097).

84871279 is a wasteful number, since it uses less digits than its factorization.

84871279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 824096.

The product of its digits is 225792, while the sum is 46.

The square root of 84871279 is about 9212.5609360264. The cubic root of 84871279 is about 439.4609082962.

It can be divided in two parts, 848 and 71279, that added together give a palindrome (72127).

The spelling of 84871279 in words is "eighty-four million, eight hundred seventy-one thousand, two hundred seventy-nine".