320420117 has 2 divisors, whose sum is σ = 320420118. Its totient is φ = 320420116.

The previous prime is 320420099. The next prime is 320420119. The reversal of 320420117 is 711024023.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 318586801 + 1833316 = 17849^2 + 1354^2 .

It is a cyclic number.

It is not a de Polignac number, because 320420117 - 2⁶ = 320420053 is a prime.

Together with 320420119, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320420119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160210058 + 160210059.

It is an arithmetic number, because the mean of its divisors is an integer number (160210059).

Almost surely, 2^320420117 is an apocalyptic number.

It is an amenable number.

320420117 is a deficient number, since it is larger than the sum of its proper divisors (1).

320420117 is an equidigital number, since it uses as much as digits as its factorization.

320420117 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 320420117 is about 17900.2825955346. The cubic root of 320420117 is about 684.2895769251.

The spelling of 320420117 in words is "three hundred twenty million, four hundred twenty thousand, one hundred seventeen".