320559377 has 2 divisors, whose sum is σ = 320559378. Its totient is φ = 320559376.

The previous prime is 320559353. The next prime is 320559383. The reversal of 320559377 is 773955023.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 213043216 + 107516161 = 14596^2 + 10369^2 .

It is a cyclic number.

It is not a de Polignac number, because 320559377 - 2⁸ = 320559121 is a prime.

It is not a weakly prime, because it can be changed into another prime (320559077) 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, 160279688 + 160279689.

It is an arithmetic number, because the mean of its divisors is an integer number (160279689).

Almost surely, 2^320559377 is an apocalyptic number.

It is an amenable number.

320559377 is a deficient number, since it is larger than the sum of its proper divisors (1).

320559377 is an equidigital number, since it uses as much as digits as its factorization.

320559377 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 198450, while the sum is 41.

The square root of 320559377 is about 17904.1720556970. The cubic root of 320559377 is about 684.3886971731.

The spelling of 320559377 in words is "three hundred twenty million, five hundred fifty-nine thousand, three hundred seventy-seven".