320121343 has 4 divisors (see below), whose sum is σ = 331160040. Its totient is φ = 309082648.

The previous prime is 320121313. The next prime is 320121349. The reversal of 320121343 is 343121023.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 343121023 = 7 ⋅49017289.

It is a cyclic number.

It is not a de Polignac number, because 320121343 - 2¹³ = 320113151 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 320121343.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320121349) 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, 5519305 + ... + 5519362.

It is an arithmetic number, because the mean of its divisors is an integer number (82790010).

Almost surely, 2^320121343 is an apocalyptic number.

320121343 is a deficient number, since it is larger than the sum of its proper divisors (11038697).

320121343 is a wasteful number, since it uses less digits than its factorization.

320121343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11038696.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 320121343 is about 17891.9351384919. The cubic root of 320121343 is about 684.0768234164.

Adding to 320121343 its reverse (343121023), we get a palindrome (663242366).

The spelling of 320121343 in words is "three hundred twenty million, one hundred twenty-one thousand, three hundred forty-three".