1323999 has 8 divisors (see below), whose sum is σ = 1961520. Its totient is φ = 882648.

The previous prime is 1323997. The next prime is 1324007. The reversal of 1323999 is 9993231.

It is not a de Polignac number, because 1323999 - 2¹ = 1323997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1323997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24492 + ... + 24545.

It is an arithmetic number, because the mean of its divisors is an integer number (245190).

2^1323999 is an apocalyptic number.

1323999 is a deficient number, since it is larger than the sum of its proper divisors (637521).

1323999 is an equidigital number, since it uses as much as digits as its factorization.

1323999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49046 (or 49040 counting only the distinct ones).

The product of its digits is 13122, while the sum is 36.

The square root of 1323999 is about 1150.6515545551. The cubic root of 1323999 is about 109.8067958408.

The spelling of 1323999 in words is "one million, three hundred twenty-three thousand, nine hundred ninety-nine".