1323312989 has 8 divisors (see below), whose sum is σ = 1329084960. Its totient is φ = 1317553776.

The previous prime is 1323312967. The next prime is 1323313067. The reversal of 1323312989 is 9892133231.

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 1323312989 - 2²⁰ = 1322264413 is a prime.

It is a super-2 number, since 2×1323312989² = 3502314533712228242, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1323312689) 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, 244814 + ... + 250160.

It is an arithmetic number, because the mean of its divisors is an integer number (166135620).

Almost surely, 2^1323312989 is an apocalyptic number.

It is an amenable number.

1323312989 is a deficient number, since it is larger than the sum of its proper divisors (5771971).

1323312989 is an equidigital number, since it uses as much as digits as its factorization.

1323312989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6379.

The product of its digits is 69984, while the sum is 41.

The square root of 1323312989 is about 36377.3691874495. The cubic root of 1323312989 is about 1097.8782762819.

The spelling of 1323312989 in words is "one billion, three hundred twenty-three million, three hundred twelve thousand, nine hundred eighty-nine".