320620321 has 8 divisors (see below), whose sum is σ = 378243584. Its totient is φ = 265952160.

The previous prime is 320620301. The next prime is 320620327. The reversal of 320620321 is 123026023.

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

It is a cyclic number.

It is not a de Polignac number, because 320620321 - 2⁹ = 320619809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320620327) 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, 738540 + ... + 738973.

It is an arithmetic number, because the mean of its divisors is an integer number (47280448).

Almost surely, 2^320620321 is an apocalyptic number.

320620321 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

320620321 is a deficient number, since it is larger than the sum of its proper divisors (57623263).

320620321 is a wasteful number, since it uses less digits than its factorization.

320620321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1477551.

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

The square root of 320620321 is about 17905.8739244975. The cubic root of 320620321 is about 684.4320658850.

Adding to 320620321 its reverse (123026023), we get a palindrome (443646344).

The spelling of 320620321 in words is "three hundred twenty million, six hundred twenty thousand, three hundred twenty-one".