1323120329 has 4 divisors (see below), whose sum is σ = 1323935184. Its totient is φ = 1322305476.

The previous prime is 1323120313. The next prime is 1323120349. The reversal of 1323120329 is 9230213231.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9230213231 = 61 ⋅151314971.

It is a cyclic number.

It is not a de Polignac number, because 1323120329 - 2⁴ = 1323120313 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1323120298 and 1323120307.

It is not an unprimeable number, because it can be changed into a prime (1323120349) 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, 404987 + ... + 408240.

It is an arithmetic number, because the mean of its divisors is an integer number (330983796).

Almost surely, 2^1323120329 is an apocalyptic number.

It is an amenable number.

1323120329 is a deficient number, since it is larger than the sum of its proper divisors (814855).

1323120329 is an equidigital number, since it uses as much as digits as its factorization.

1323120329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 814854.

The product of its (nonzero) digits is 1944, while the sum is 26.

The square root of 1323120329 is about 36374.7210161123. The cubic root of 1323120329 is about 1097.8249939780.

The spelling of 1323120329 in words is "one billion, three hundred twenty-three million, one hundred twenty thousand, three hundred twenty-nine".