328261709 has 2 divisors, whose sum is σ = 328261710. Its totient is φ = 328261708.

The previous prime is 328261693. The next prime is 328261711. The reversal of 328261709 is 907162823.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 225300100 + 102961609 = 15010^2 + 10147^2 .

It is a cyclic number.

It is not a de Polignac number, because 328261709 - 2⁴ = 328261693 is a prime.

Together with 328261711, 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 (328261799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 164130854 + 164130855.

It is an arithmetic number, because the mean of its divisors is an integer number (164130855).

Almost surely, 2^328261709 is an apocalyptic number.

It is an amenable number.

328261709 is a deficient number, since it is larger than the sum of its proper divisors (1).

328261709 is an equidigital number, since it uses as much as digits as its factorization.

328261709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 328261709 is about 18117.9940666731. The cubic root of 328261709 is about 689.8268199420.

The spelling of 328261709 in words is "three hundred twenty-eight million, two hundred sixty-one thousand, seven hundred nine".