320053709 has 2 divisors, whose sum is σ = 320053710. Its totient is φ = 320053708.

The previous prime is 320053631. The next prime is 320053759. The reversal of 320053709 is 907350023.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 288660100 + 31393609 = 16990^2 + 5603^2 .

It is a cyclic number.

It is not a de Polignac number, because 320053709 - 2⁸ = 320053453 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320053759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160026854 + 160026855.

It is an arithmetic number, because the mean of its divisors is an integer number (160026855).

Almost surely, 2^320053709 is an apocalyptic number.

It is an amenable number.

320053709 is a deficient number, since it is larger than the sum of its proper divisors (1).

320053709 is an equidigital number, since it uses as much as digits as its factorization.

320053709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5670, while the sum is 29.

The square root of 320053709 is about 17890.0449692000. The cubic root of 320053709 is about 684.0286436542.

The spelling of 320053709 in words is "three hundred twenty million, fifty-three thousand, seven hundred nine".