320448091 has 4 divisors (see below), whose sum is σ = 337313800. Its totient is φ = 303582384.

The previous prime is 320448059. The next prime is 320448103. The reversal of 320448091 is 190844023.

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 320448091 - 2⁵ = 320448059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320448001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8432826 + ... + 8432863.

It is an arithmetic number, because the mean of its divisors is an integer number (84328450).

Almost surely, 2^320448091 is an apocalyptic number.

320448091 is a deficient number, since it is larger than the sum of its proper divisors (16865709).

320448091 is a wasteful number, since it uses less digits than its factorization.

320448091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16865708.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 320448091 is about 17901.0639627928. The cubic root of 320448091 is about 684.3094901147.

The spelling of 320448091 in words is "three hundred twenty million, four hundred forty-eight thousand, ninety-one".