320105891 has 8 divisors (see below), whose sum is σ = 367693920. Its totient is φ = 272982528.

The previous prime is 320105873. The next prime is 320105893. The reversal of 320105891 is 198501023.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 320105891 - 2⁶ = 320105827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320105893) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 114686 + ... + 117443.

It is an arithmetic number, because the mean of its divisors is an integer number (45961740).

Almost surely, 2^320105891 is an apocalyptic number.

320105891 is a deficient number, since it is larger than the sum of its proper divisors (47588029).

320105891 is a wasteful number, since it uses less digits than its factorization.

320105891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232333.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 320105891 is about 17891.5033186147. The cubic root of 320105891 is about 684.0658166265.

The spelling of 320105891 in words is "three hundred twenty million, one hundred five thousand, eight hundred ninety-one".