320145757 has 2 divisors, whose sum is σ = 320145758. Its totient is φ = 320145756.

The previous prime is 320145701. The next prime is 320145767. The reversal of 320145757 is 757541023.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 203376121 + 116769636 = 14261^2 + 10806^2 .

It is a cyclic number.

It is not a de Polignac number, because 320145757 - 2¹¹ = 320143709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320145767) 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, 160072878 + 160072879.

It is an arithmetic number, because the mean of its divisors is an integer number (160072879).

Almost surely, 2^320145757 is an apocalyptic number.

It is an amenable number.

320145757 is a deficient number, since it is larger than the sum of its proper divisors (1).

320145757 is an equidigital number, since it uses as much as digits as its factorization.

320145757 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 29400, while the sum is 34.

The square root of 320145757 is about 17892.6173881856. The cubic root of 320145757 is about 684.0942133087.

The spelling of 320145757 in words is "three hundred twenty million, one hundred forty-five thousand, seven hundred fifty-seven".