1999445323 has 2 divisors, whose sum is σ = 1999445324. Its totient is φ = 1999445322.

The previous prime is 1999445321. The next prime is 1999445341. The reversal of 1999445323 is 3235449991.

It is a weak prime.

It is an emirp because it is prime and its reverse (3235449991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1999445323 - 2¹ = 1999445321 is a prime.

Together with 1999445321, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1999445321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 999722661 + 999722662.

It is an arithmetic number, because the mean of its divisors is an integer number (999722662).

Almost surely, 2^1999445323 is an apocalyptic number.

1999445323 is a deficient number, since it is larger than the sum of its proper divisors (1).

1999445323 is an equidigital number, since it uses as much as digits as its factorization.

1999445323 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1049760, while the sum is 49.

The square root of 1999445323 is about 44715.1576425713. The cubic root of 1999445323 is about 1259.8045642542.

The spelling of 1999445323 in words is "one billion, nine hundred ninety-nine million, four hundred forty-five thousand, three hundred twenty-three".