1323979289 has 4 divisors (see below), whose sum is σ = 1324068900. Its totient is φ = 1323889680.

The previous prime is 1323979243. The next prime is 1323979297. The reversal of 1323979289 is 9829793231.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9829793231 = 479 ⋅20521489.

It can be written as a sum of positive squares in 2 ways, for example, as 510760000 + 813219289 = 22600^2 + 28517^2 .

It is a cyclic number.

It is not a de Polignac number, because 1323979289 - 2¹⁶ = 1323913753 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1323979289.

It is not an unprimeable number, because it can be changed into a prime (1323979229) 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, 16814 + ... + 54135.

It is an arithmetic number, because the mean of its divisors is an integer number (331017225).

Almost surely, 2^1323979289 is an apocalyptic number.

It is an amenable number.

1323979289 is a deficient number, since it is larger than the sum of its proper divisors (89611).

1323979289 is an equidigital number, since it uses as much as digits as its factorization.

1323979289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89610.

The product of its digits is 1469664, while the sum is 53.

The square root of 1323979289 is about 36386.5262013290. The cubic root of 1323979289 is about 1098.0625092288.

The spelling of 1323979289 in words is "one billion, three hundred twenty-three million, nine hundred seventy-nine thousand, two hundred eighty-nine".