320101909 has 2 divisors, whose sum is σ = 320101910. Its totient is φ = 320101908.

The previous prime is 320101889. The next prime is 320101921. The reversal of 320101909 is 909101023.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 294122500 + 25979409 = 17150^2 + 5097^2 .

It is an emirp because it is prime and its reverse (909101023) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 320101909 - 2⁷ = 320101781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320101979) 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, 160050954 + 160050955.

It is an arithmetic number, because the mean of its divisors is an integer number (160050955).

Almost surely, 2^320101909 is an apocalyptic number.

It is an amenable number.

320101909 is a deficient number, since it is larger than the sum of its proper divisors (1).

320101909 is an equidigital number, since it uses as much as digits as its factorization.

320101909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 486, while the sum is 25.

The square root of 320101909 is about 17891.3920363956. The cubic root of 320101909 is about 684.0629801053.

The spelling of 320101909 in words is "three hundred twenty million, one hundred one thousand, nine hundred nine".