4320391085 has 4 divisors (see below), whose sum is σ = 5184469308. Its totient is φ = 3456312864.

The previous prime is 4320391079. The next prime is 4320391123. The reversal of 4320391085 is 5801930234.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3338759524 + 981631561 = 57782^2 + 31331^2 .

It is a cyclic number.

It is not a de Polignac number, because 4320391085 - 2⁶ = 4320391021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 432039104 + ... + 432039113.

It is an arithmetic number, because the mean of its divisors is an integer number (1296117327).

Almost surely, 2^4320391085 is an apocalyptic number.

It is an amenable number.

4320391085 is a deficient number, since it is larger than the sum of its proper divisors (864078223).

4320391085 is an equidigital number, since it uses as much as digits as its factorization.

4320391085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 864078222.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 4320391085 is about 65729.6819176846. The cubic root of 4320391085 is about 1628.6997151412.

The spelling of 4320391085 in words is "four billion, three hundred twenty million, three hundred ninety-one thousand, eighty-five".