84443131 has 4 divisors (see below), whose sum is σ = 89410392. Its totient is φ = 79475872.

The previous prime is 84443129. The next prime is 84443147. The reversal of 84443131 is 13134448.

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 84443131 - 2¹ = 84443129 is a prime.

It is a super-2 number, since 2×84443131² = 14261284746166322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 84443131.

It is not an unprimeable number, because it can be changed into a prime (84443531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2483605 + ... + 2483638.

It is an arithmetic number, because the mean of its divisors is an integer number (22352598).

Almost surely, 2^84443131 is an apocalyptic number.

84443131 is a deficient number, since it is larger than the sum of its proper divisors (4967261).

84443131 is a wasteful number, since it uses less digits than its factorization.

84443131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4967260.

The product of its digits is 4608, while the sum is 28.

The square root of 84443131 is about 9189.2943689926. The cubic root of 84443131 is about 438.7206830464.

Adding to 84443131 its reverse (13134448), we get a palindrome (97577579).

The spelling of 84443131 in words is "eighty-four million, four hundred forty-three thousand, one hundred thirty-one".