1328900609 has 2 divisors, whose sum is σ = 1328900610. Its totient is φ = 1328900608.

The previous prime is 1328900597. The next prime is 1328900627. The reversal of 1328900609 is 9060098231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1305232384 + 23668225 = 36128^2 + 4865^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1328900609 is a prime.

It is not a weakly prime, because it can be changed into another prime (1328900689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 664450304 + 664450305.

It is an arithmetic number, because the mean of its divisors is an integer number (664450305).

Almost surely, 2^1328900609 is an apocalyptic number.

It is an amenable number.

1328900609 is a deficient number, since it is larger than the sum of its proper divisors (1).

1328900609 is an equidigital number, since it uses as much as digits as its factorization.

1328900609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 1328900609 is about 36454.0890573335. The cubic root of 1328900609 is about 1099.4213510302.

The spelling of 1328900609 in words is "one billion, three hundred twenty-eight million, nine hundred thousand, six hundred nine".