9923321899 has 2 divisors, whose sum is σ = 9923321900. Its totient is φ = 9923321898.

The previous prime is 9923321879. The next prime is 9923321909. The reversal of 9923321899 is 9981233299.

It is a strong prime.

It is an emirp because it is prime and its reverse (9981233299) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9923321899 - 2¹³ = 9923313707 is a prime.

It is a super-2 number, since 2×9923321899² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (9923321879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4961660949 + 4961660950.

It is an arithmetic number, because the mean of its divisors is an integer number (4961660950).

Almost surely, 2^9923321899 is an apocalyptic number.

9923321899 is a deficient number, since it is larger than the sum of its proper divisors (1).

9923321899 is an equidigital number, since it uses as much as digits as its factorization.

9923321899 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1889568, while the sum is 55.

The square root of 9923321899 is about 99615.8717223315. The cubic root of 9923321899 is about 2148.9139565580.

The spelling of 9923321899 in words is "nine billion, nine hundred twenty-three million, three hundred twenty-one thousand, eight hundred ninety-nine".