1323649 has 2 divisors, whose sum is σ = 1323650. Its totient is φ = 1323648.

The previous prime is 1323629. The next prime is 1323659. The reversal of 1323649 is 9463231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 672400 + 651249 = 820^2 + 807^2 .

It is a cyclic number.

It is not a de Polignac number, because 1323649 - 2⁹ = 1323137 is a prime.

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

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 661824 + 661825.

It is an arithmetic number, because the mean of its divisors is an integer number (661825).

2^1323649 is an apocalyptic number.

It is an amenable number.

1323649 is a deficient number, since it is larger than the sum of its proper divisors (1).

1323649 is an equidigital number, since it uses as much as digits as its factorization.

1323649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888, while the sum is 28.

The square root of 1323649 is about 1150.4994567578. The cubic root of 1323649 is about 109.7971191554.

The spelling of 1323649 in words is "one million, three hundred twenty-three thousand, six hundred forty-nine".