1323664885 has 4 divisors (see below), whose sum is σ = 1588397868. Its totient is φ = 1058931904.

The previous prime is 1323664861. The next prime is 1323664889. The reversal of 1323664885 is 5884663231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5884663231 = 83 ⋅70899557.

It can be written as a sum of positive squares in 2 ways, for example, as 433597329 + 890067556 = 20823^2 + 29834^2 .

It is a cyclic number.

It is not a de Polignac number, because 1323664885 - 2⁷ = 1323664757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1323664889) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 132366484 + ... + 132366493.

It is an arithmetic number, because the mean of its divisors is an integer number (397099467).

Almost surely, 2^1323664885 is an apocalyptic number.

It is an amenable number.

1323664885 is a deficient number, since it is larger than the sum of its proper divisors (264732983).

1323664885 is an equidigital number, since it uses as much as digits as its factorization.

1323664885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264732982.

The product of its digits is 829440, while the sum is 46.

The square root of 1323664885 is about 36382.2056093360. The cubic root of 1323664885 is about 1097.9755837562.

The spelling of 1323664885 in words is "one billion, three hundred twenty-three million, six hundred sixty-four thousand, eight hundred eighty-five".