328599997909 has 2 divisors, whose sum is σ = 328599997910. Its totient is φ = 328599997908.

The previous prime is 328599997907. The next prime is 328599997967. The reversal of 328599997909 is 909799995823.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 249890012100 + 78709985809 = 499890^2 + 280553^2 .

It is a cyclic number.

It is not a de Polignac number, because 328599997909 - 2¹ = 328599997907 is a prime.

Together with 328599997907, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (328599997907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 164299998954 + 164299998955.

It is an arithmetic number, because the mean of its divisors is an integer number (164299998955).

Almost surely, 2^328599997909 is an apocalyptic number.

It is an amenable number.

328599997909 is a deficient number, since it is larger than the sum of its proper divisors (1).

328599997909 is an equidigital number, since it uses as much as digits as its factorization.

328599997909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 892820880, while the sum is 79.

The spelling of 328599997909 in words is "three hundred twenty-eight billion, five hundred ninety-nine million, nine hundred ninety-seven thousand, nine hundred nine".