84448813 has 2 divisors, whose sum is σ = 84448814. Its totient is φ = 84448812.

The previous prime is 84448781. The next prime is 84448829. The reversal of 84448813 is 31884448.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49378729 + 35070084 = 7027^2 + 5922^2 .

It is a cyclic number.

It is not a de Polignac number, because 84448813 - 2⁵ = 84448781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84418813) 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 as a sum of consecutive naturals, namely, 42224406 + 42224407.

It is an arithmetic number, because the mean of its divisors is an integer number (42224407).

Almost surely, 2^84448813 is an apocalyptic number.

It is an amenable number.

84448813 is a deficient number, since it is larger than the sum of its proper divisors (1).

84448813 is an equidigital number, since it uses as much as digits as its factorization.

84448813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 98304, while the sum is 40.

The square root of 84448813 is about 9189.6035279004. The cubic root of 84448813 is about 438.7305230218.

The spelling of 84448813 in words is "eighty-four million, four hundred forty-eight thousand, eight hundred thirteen".