320400433 has 2 divisors, whose sum is σ = 320400434. Its totient is φ = 320400432.

The previous prime is 320400413. The next prime is 320400467. The reversal of 320400433 is 334004023.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 215296929 + 105103504 = 14673^2 + 10252^2 .

It is a cyclic number.

It is not a de Polignac number, because 320400433 - 2⁹ = 320399921 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 320400433.

It is not a weakly prime, because it can be changed into another prime (320400413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160200216 + 160200217.

It is an arithmetic number, because the mean of its divisors is an integer number (160200217).

Almost surely, 2^320400433 is an apocalyptic number.

It is an amenable number.

320400433 is a deficient number, since it is larger than the sum of its proper divisors (1).

320400433 is an equidigital number, since it uses as much as digits as its factorization.

320400433 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 19.

The square root of 320400433 is about 17899.7327633683. The cubic root of 320400433 is about 684.2755642471.

Adding to 320400433 its reverse (334004023), we get a palindrome (654404456).

The spelling of 320400433 in words is "three hundred twenty million, four hundred thousand, four hundred thirty-three".