320955577 has 2 divisors, whose sum is σ = 320955578. Its totient is φ = 320955576.

The previous prime is 320955541. The next prime is 320955601. The reversal of 320955577 is 775559023.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 241460521 + 79495056 = 15539^2 + 8916^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-320955577 is a prime.

It is not a weakly prime, because it can be changed into another prime (320950577) 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, 160477788 + 160477789.

It is an arithmetic number, because the mean of its divisors is an integer number (160477789).

Almost surely, 2^320955577 is an apocalyptic number.

It is an amenable number.

320955577 is a deficient number, since it is larger than the sum of its proper divisors (1).

320955577 is an equidigital number, since it uses as much as digits as its factorization.

320955577 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 330750, while the sum is 43.

The square root of 320955577 is about 17915.2330992371. The cubic root of 320955577 is about 684.6705411260.

The spelling of 320955577 in words is "three hundred twenty million, nine hundred fifty-five thousand, five hundred seventy-seven".