1328491223 has 2 divisors, whose sum is σ = 1328491224. Its totient is φ = 1328491222.

The previous prime is 1328491211. The next prime is 1328491243. The reversal of 1328491223 is 3221948231.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (3221948231) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1328491223 - 2⁸ = 1328490967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1328491243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 664245611 + 664245612.

It is an arithmetic number, because the mean of its divisors is an integer number (664245612).

Almost surely, 2^1328491223 is an apocalyptic number.

1328491223 is a deficient number, since it is larger than the sum of its proper divisors (1).

1328491223 is an equidigital number, since it uses as much as digits as its factorization.

1328491223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 35.

The square root of 1328491223 is about 36448.4735345666. The cubic root of 1328491223 is about 1099.3084421759.

The spelling of 1328491223 in words is "one billion, three hundred twenty-eight million, four hundred ninety-one thousand, two hundred twenty-three".