320696393 has 2 divisors, whose sum is σ = 320696394. Its totient is φ = 320696392.

The previous prime is 320696351. The next prime is 320696399. The reversal of 320696393 is 393696023.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 313006864 + 7689529 = 17692^2 + 2773^2 .

It is a cyclic number.

It is not a de Polignac number, because 320696393 - 2¹² = 320692297 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 320696393.

It is not a weakly prime, because it can be changed into another prime (320696399) 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, 160348196 + 160348197.

It is an arithmetic number, because the mean of its divisors is an integer number (160348197).

Almost surely, 2^320696393 is an apocalyptic number.

It is an amenable number.

320696393 is a deficient number, since it is larger than the sum of its proper divisors (1).

320696393 is an equidigital number, since it uses as much as digits as its factorization.

320696393 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 157464, while the sum is 41.

The square root of 320696393 is about 17907.9980176456. The cubic root of 320696393 is about 684.4861922097.

It can be divided in two parts, 3206 and 96393, that added together give a palindrome (99599).

The spelling of 320696393 in words is "three hundred twenty million, six hundred ninety-six thousand, three hundred ninety-three".