1323689 has 2 divisors, whose sum is σ = 1323690. Its totient is φ = 1323688.

The previous prime is 1323659. The next prime is 1323691. The reversal of 1323689 is 9863231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1283689 + 40000 = 1133^2 + 200^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1323689 is a prime.

Together with 1323691, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1323629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 661844 + 661845.

It is an arithmetic number, because the mean of its divisors is an integer number (661845).

2^1323689 is an apocalyptic number.

It is an amenable number.

1323689 is a deficient number, since it is larger than the sum of its proper divisors (1).

1323689 is an equidigital number, since it uses as much as digits as its factorization.

1323689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 32.

The square root of 1323689 is about 1150.5168403809. The cubic root of 1323689 is about 109.7982251486.

The spelling of 1323689 in words is "one million, three hundred twenty-three thousand, six hundred eighty-nine".