320950057 has 2 divisors, whose sum is σ = 320950058. Its totient is φ = 320950056.

The previous prime is 320949997. The next prime is 320950093. The reversal of 320950057 is 750059023.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 209351961 + 111598096 = 14469^2 + 10564^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-320950057 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (320950757) 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, 160475028 + 160475029.

It is an arithmetic number, because the mean of its divisors is an integer number (160475029).

Almost surely, 2^320950057 is an apocalyptic number.

It is an amenable number.

320950057 is a deficient number, since it is larger than the sum of its proper divisors (1).

320950057 is an equidigital number, since it uses as much as digits as its factorization.

320950057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9450, while the sum is 31.

The square root of 320950057 is about 17915.0790397363. The cubic root of 320950057 is about 684.6666159691. Note that the first 4 decimals are identical.

The spelling of 320950057 in words is "three hundred twenty million, nine hundred fifty thousand, fifty-seven".