9992321 has 2 divisors, whose sum is σ = 9992322.
Its totient is φ = 9992320.
The previous prime is 9992291. The next prime is 9992329. The reversal of 9992321 is 1232999.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 9991921 + 400 = 3161^2 + 20^2
It is an emirp because it is prime and its reverse (1232999) is a distict prime.
It is a cyclic number.
It is not a de Polignac number, because 9992321 - 210 = 9991297 is a prime.
It is not a weakly prime, because it can be changed into another prime (9992329) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4996160 + 4996161.
It is an arithmetic number, because the mean of its divisors is an integer number (4996161).
Almost surely, 29992321 is an apocalyptic number.
It is an amenable number.
9992321 is a deficient number, since it is larger than the sum of its proper divisors (1).
9992321 is an equidigital number, since it uses as much as digits as its factorization.
9992321 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 8748, while the sum is 35.
The square root of 9992321 is about 3161.0632704835.
The cubic root of 9992321 is about 215.3883085349.
The spelling of 9992321 in words is "nine million, nine hundred ninety-two thousand, three hundred twenty-one".