320043893 has 4 divisors (see below), whose sum is σ = 344662668. Its totient is φ = 295425120.

The previous prime is 320043869. The next prime is 320043901. The reversal of 320043893 is 398340023.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 398340023 = 3931 ⋅101333.

It can be written as a sum of positive squares in 2 ways, for example, as 213685924 + 106357969 = 14618^2 + 10313^2 .

It is a cyclic number.

It is not a de Polignac number, because 320043893 - 2¹⁶ = 319978357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320043803) by changing a digit.

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, 12309368 + ... + 12309393.

It is an arithmetic number, because the mean of its divisors is an integer number (86165667).

Almost surely, 2^320043893 is an apocalyptic number.

It is an amenable number.

320043893 is a deficient number, since it is larger than the sum of its proper divisors (24618775).

320043893 is a wasteful number, since it uses less digits than its factorization.

320043893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24618774.

The product of its (nonzero) digits is 15552, while the sum is 32.

The square root of 320043893 is about 17889.7706245776. The cubic root of 320043893 is about 684.0216505635.

The spelling of 320043893 in words is "three hundred twenty million, forty-three thousand, eight hundred ninety-three".