320123389 has 2 divisors, whose sum is σ = 320123390. Its totient is φ = 320123388.

The previous prime is 320123359. The next prime is 320123393. The reversal of 320123389 is 983321023.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 320052100 + 71289 = 17890^2 + 267^2 .

It is a cyclic number.

It is not a de Polignac number, because 320123389 - 2⁹ = 320122877 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 320123389.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320123359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160061694 + 160061695.

It is an arithmetic number, because the mean of its divisors is an integer number (160061695).

Almost surely, 2^320123389 is an apocalyptic number.

It is an amenable number.

320123389 is a deficient number, since it is larger than the sum of its proper divisors (1).

320123389 is an equidigital number, since it uses as much as digits as its factorization.

320123389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 320123389 is about 17891.9923149995. The cubic root of 320123389 is about 684.0782807994.

The spelling of 320123389 in words is "three hundred twenty million, one hundred twenty-three thousand, three hundred eighty-nine".