84448009 has 2 divisors, whose sum is σ = 84448010. Its totient is φ = 84448008.

The previous prime is 84447997. The next prime is 84448031. The reversal of 84448009 is 90084448.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78057225 + 6390784 = 8835^2 + 2528^2 .

It is a cyclic number.

It is not a de Polignac number, because 84448009 - 2¹¹ = 84445961 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (84448099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42224004 + 42224005.

It is an arithmetic number, because the mean of its divisors is an integer number (42224005).

Almost surely, 2^84448009 is an apocalyptic number.

It is an amenable number.

84448009 is a deficient number, since it is larger than the sum of its proper divisors (1).

84448009 is an equidigital number, since it uses as much as digits as its factorization.

84448009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36864, while the sum is 37.

The square root of 84448009 is about 9189.5597827099. The cubic root of 84448009 is about 438.7291306973.

The spelling of 84448009 in words is "eighty-four million, four hundred forty-eight thousand, nine".