9991254223 has 2 divisors, whose sum is σ = 9991254224. Its totient is φ = 9991254222.

The previous prime is 9991254191. The next prime is 9991254271. The reversal of 9991254223 is 3224521999.

9991254223 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9991254223 - 2⁵ = 9991254191 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9991254283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4995627111 + 4995627112.

It is an arithmetic number, because the mean of its divisors is an integer number (4995627112).

Almost surely, 2^9991254223 is an apocalyptic number.

9991254223 is a deficient number, since it is larger than the sum of its proper divisors (1).

9991254223 is an equidigital number, since it uses as much as digits as its factorization.

9991254223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 349920, while the sum is 46.

The square root of 9991254223 is about 99956.2615497398. The cubic root of 9991254223 is about 2153.8064333312.

The spelling of 9991254223 in words is "nine billion, nine hundred ninety-one million, two hundred fifty-four thousand, two hundred twenty-three".