1328897 has 2 divisors, whose sum is σ = 1328898. Its totient is φ = 1328896.

The previous prime is 1328893. The next prime is 1328909. The reversal of 1328897 is 7988231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1324801 + 4096 = 1151^2 + 64^2 .

It is a cyclic number.

It is not a de Polignac number, because 1328897 - 2² = 1328893 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1328897.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1328891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 664448 + 664449.

It is an arithmetic number, because the mean of its divisors is an integer number (664449).

2^1328897 is an apocalyptic number.

It is an amenable number.

1328897 is a deficient number, since it is larger than the sum of its proper divisors (1).

1328897 is an equidigital number, since it uses as much as digits as its factorization.

1328897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24192, while the sum is 38.

The square root of 1328897 is about 1152.7779491298. Note that the first 3 decimals coincide. The cubic root of 1328897 is about 109.9420355768.

The spelling of 1328897 in words is "one million, three hundred twenty-eight thousand, eight hundred ninety-seven".