320445497 has 2 divisors, whose sum is σ = 320445498. Its totient is φ = 320445496.

The previous prime is 320445467. The next prime is 320445539. The reversal of 320445497 is 794544023.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 304293136 + 16152361 = 17444^2 + 4019^2 .

It is a cyclic number.

It is not a de Polignac number, because 320445497 - 2¹⁰ = 320444473 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 320445497.

It is not a weakly prime, because it can be changed into another prime (320445467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160222748 + 160222749.

It is an arithmetic number, because the mean of its divisors is an integer number (160222749).

Almost surely, 2^320445497 is an apocalyptic number.

It is an amenable number.

320445497 is a deficient number, since it is larger than the sum of its proper divisors (1).

320445497 is an equidigital number, since it uses as much as digits as its factorization.

320445497 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120960, while the sum is 38.

The square root of 320445497 is about 17900.9915088522. The cubic root of 320445497 is about 684.3076436340.

The spelling of 320445497 in words is "three hundred twenty million, four hundred forty-five thousand, four hundred ninety-seven".