1326197663 has 8 divisors (see below), whose sum is σ = 1595425920. Its totient is φ = 1076912280.

The previous prime is 1326197651. The next prime is 1326197669. The reversal of 1326197663 is 3667916231.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1326197663 - 2⁸ = 1326197407 is a prime.

It is a super-3 number, since 3×1326197663³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1326197669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4985573 + ... + 4985838.

It is an arithmetic number, because the mean of its divisors is an integer number (199428240).

Almost surely, 2^1326197663 is an apocalyptic number.

1326197663 is a deficient number, since it is larger than the sum of its proper divisors (269228257).

1326197663 is an equidigital number, since it uses as much as digits as its factorization.

1326197663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9971437.

The product of its digits is 244944, while the sum is 44.

The square root of 1326197663 is about 36416.9968970534. The cubic root of 1326197663 is about 1098.6754478449.

The spelling of 1326197663 in words is "one billion, three hundred twenty-six million, one hundred ninety-seven thousand, six hundred sixty-three".