320404433 has 2 divisors, whose sum is σ = 320404434. Its totient is φ = 320404432.

The previous prime is 320404417. The next prime is 320404459. The reversal of 320404433 is 334404023.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 290941249 + 29463184 = 17057^2 + 5428^2 .

It is a cyclic number.

It is not a de Polignac number, because 320404433 - 2⁴ = 320404417 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 320404399 and 320404408.

It is not a weakly prime, because it can be changed into another prime (320404033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160202216 + 160202217.

It is an arithmetic number, because the mean of its divisors is an integer number (160202217).

Almost surely, 2^320404433 is an apocalyptic number.

It is an amenable number.

320404433 is a deficient number, since it is larger than the sum of its proper divisors (1).

320404433 is an equidigital number, since it uses as much as digits as its factorization.

320404433 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 23.

The square root of 320404433 is about 17899.8444965312. The cubic root of 320404433 is about 684.2784118201.

Adding to 320404433 its reverse (334404023), we get a palindrome (654808456).

The spelling of 320404433 in words is "three hundred twenty million, four hundred four thousand, four hundred thirty-three".