1999323 has 10 divisors (see below), whose sum is σ = 2986764. Its totient is φ = 1332828.

The previous prime is 1999307. The next prime is 1999331. The reversal of 1999323 is 3239991.

It is not a de Polignac number, because 1999323 - 2⁴ = 1999307 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1999303) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 12261 + ... + 12422.

2^1999323 is an apocalyptic number.

1999323 is a deficient number, since it is larger than the sum of its proper divisors (987441).

1999323 is an equidigital number, since it uses as much as digits as its factorization.

1999323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24695 (or 24686 counting only the distinct ones).

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

The square root of 1999323 is about 1413.9741864688. The cubic root of 1999323 is about 125.9778872760.

The spelling of 1999323 in words is "one million, nine hundred ninety-nine thousand, three hundred twenty-three".