320797133 has 2 divisors, whose sum is σ = 320797134. Its totient is φ = 320797132.

The previous prime is 320797129. The next prime is 320797153. The reversal of 320797133 is 331797023.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 204976489 + 115820644 = 14317^2 + 10762^2 .

It is a cyclic number.

It is not a de Polignac number, because 320797133 - 2² = 320797129 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 320797093 and 320797102.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320797153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160398566 + 160398567.

It is an arithmetic number, because the mean of its divisors is an integer number (160398567).

Almost surely, 2^320797133 is an apocalyptic number.

It is an amenable number.

320797133 is a deficient number, since it is larger than the sum of its proper divisors (1).

320797133 is an equidigital number, since it uses as much as digits as its factorization.

320797133 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23814, while the sum is 35.

The square root of 320797133 is about 17910.8105065070. The cubic root of 320797133 is about 684.5578570008.

The spelling of 320797133 in words is "three hundred twenty million, seven hundred ninety-seven thousand, one hundred thirty-three".