320424353 has 4 divisors (see below), whose sum is σ = 320862228. Its totient is φ = 319986480.

The previous prime is 320424343. The next prime is 320424359. The reversal of 320424353 is 353424023.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 353424023 = 277 ⋅1275899.

It can be written as a sum of positive squares in 2 ways, for example, as 299566864 + 20857489 = 17308^2 + 4567^2 .

It is a cyclic number.

It is not a de Polignac number, because 320424353 - 2⁴ = 320424337 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (320424359) 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, 217838 + ... + 219303.

It is an arithmetic number, because the mean of its divisors is an integer number (80215557).

Almost surely, 2^320424353 is an apocalyptic number.

It is an amenable number.

320424353 is a deficient number, since it is larger than the sum of its proper divisors (437875).

320424353 is an equidigital number, since it uses as much as digits as its factorization.

320424353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437874.

The product of its (nonzero) digits is 8640, while the sum is 26.

The square root of 320424353 is about 17900.4009172979. The cubic root of 320424353 is about 684.2925923807.

Adding to 320424353 its reverse (353424023), we get a palindrome (673848376).

The spelling of 320424353 in words is "three hundred twenty million, four hundred twenty-four thousand, three hundred fifty-three".