320043697 has 2 divisors, whose sum is σ = 320043698. Its totient is φ = 320043696.

The previous prime is 320043679. The next prime is 320043707. The reversal of 320043697 is 796340023.

Together with previous prime (320043679) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 226321936 + 93721761 = 15044^2 + 9681^2 .

It is an emirp because it is prime and its reverse (796340023) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 320043697 - 2¹¹ = 320041649 is a prime.

It is not a weakly prime, because it can be changed into another prime (320043617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160021848 + 160021849.

It is an arithmetic number, because the mean of its divisors is an integer number (160021849).

Almost surely, 2^320043697 is an apocalyptic number.

It is an amenable number.

320043697 is a deficient number, since it is larger than the sum of its proper divisors (1).

320043697 is an equidigital number, since it uses as much as digits as its factorization.

320043697 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216, while the sum is 34.

The square root of 320043697 is about 17889.7651465859. The cubic root of 320043697 is about 684.0215109282.

The spelling of 320043697 in words is "three hundred twenty million, forty-three thousand, six hundred ninety-seven".