320123129 has 2 divisors, whose sum is σ = 320123130. Its totient is φ = 320123128.

The previous prime is 320123113. The next prime is 320123137. The reversal of 320123129 is 921321023.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 315879529 + 4243600 = 17773^2 + 2060^2 .

It is a cyclic number.

It is not a de Polignac number, because 320123129 - 2⁴ = 320123113 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (320123159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160061564 + 160061565.

It is an arithmetic number, because the mean of its divisors is an integer number (160061565).

Almost surely, 2^320123129 is an apocalyptic number.

It is an amenable number.

320123129 is a deficient number, since it is larger than the sum of its proper divisors (1).

320123129 is an equidigital number, since it uses as much as digits as its factorization.

320123129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 320123129 is about 17891.9850491777. The cubic root of 320123129 is about 684.0780955996.

The spelling of 320123129 in words is "three hundred twenty million, one hundred twenty-three thousand, one hundred twenty-nine".