328090909 has 2 divisors, whose sum is σ = 328090910. Its totient is φ = 328090908.

The previous prime is 328090901. The next prime is 328090913. The reversal of 328090909 is 909090823.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 257698809 + 70392100 = 16053^2 + 8390^2 .

It is an emirp because it is prime and its reverse (909090823) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 328090909 - 2³ = 328090901 is a prime.

328090909 is a modest number, since divided by 90909 gives 328 as remainder.

It is equal to p_17688118 and since 328090909 and 17688118 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (328090901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 164045454 + 164045455.

It is an arithmetic number, because the mean of its divisors is an integer number (164045455).

Almost surely, 2^328090909 is an apocalyptic number.

It is an amenable number.

328090909 is a deficient number, since it is larger than the sum of its proper divisors (1).

328090909 is an equidigital number, since it uses as much as digits as its factorization.

328090909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34992, while the sum is 40.

The square root of 328090909 is about 18113.2799072945. The cubic root of 328090909 is about 689.7071564149.

The spelling of 328090909 in words is "three hundred twenty-eight million, ninety thousand, nine hundred nine".