9919223 has 2 divisors, whose sum is σ = 9919224. Its totient is φ = 9919222.

The previous prime is 9919201. The next prime is 9919229. The reversal of 9919223 is 3229199.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9919223 - 2¹⁰ = 9918199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9919229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4959611 + 4959612.

It is an arithmetic number, because the mean of its divisors is an integer number (4959612).

Almost surely, 2^9919223 is an apocalyptic number.

9919223 is a deficient number, since it is larger than the sum of its proper divisors (1).

9919223 is an equidigital number, since it uses as much as digits as its factorization.

9919223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8748, while the sum is 35.

The square root of 9919223 is about 3149.4797983159. The cubic root of 9919223 is about 214.8618041057.

The spelling of 9919223 in words is "nine million, nine hundred nineteen thousand, two hundred twenty-three".