1323441643 has 8 divisors (see below), whose sum is σ = 1382267808. Its totient is φ = 1264722624.

The previous prime is 1323441611. The next prime is 1323441661. The reversal of 1323441643 is 3461443231.

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 1323441643 - 2⁵ = 1323441611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1323441943) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 996 + ... + 51457.

It is an arithmetic number, because the mean of its divisors is an integer number (172783476).

Almost surely, 2^1323441643 is an apocalyptic number.

1323441643 is a deficient number, since it is larger than the sum of its proper divisors (58826165).

1323441643 is a wasteful number, since it uses less digits than its factorization.

1323441643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53573.

The product of its digits is 20736, while the sum is 31.

The square root of 1323441643 is about 36379.1374691594. The cubic root of 1323441643 is about 1097.9138541222.

Adding to 1323441643 its reverse (3461443231), we get a palindrome (4784884874).

The spelling of 1323441643 in words is "one billion, three hundred twenty-three million, four hundred forty-one thousand, six hundred forty-three".