9219847123 has 2 divisors, whose sum is σ = 9219847124. Its totient is φ = 9219847122.

The previous prime is 9219847097. The next prime is 9219847157. The reversal of 9219847123 is 3217489129.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9219847123 - 2⁹ = 9219846611 is a prime.

It is not a weakly prime, because it can be changed into another prime (9219847163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4609923561 + 4609923562.

It is an arithmetic number, because the mean of its divisors is an integer number (4609923562).

Almost surely, 2^9219847123 is an apocalyptic number.

9219847123 is a deficient number, since it is larger than the sum of its proper divisors (1).

9219847123 is an equidigital number, since it uses as much as digits as its factorization.

9219847123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 46.

The square root of 9219847123 is about 96020.0350083252. The cubic root of 9219847123 is about 2096.8848084198.

The spelling of 9219847123 in words is "nine billion, two hundred nineteen million, eight hundred forty-seven thousand, one hundred twenty-three".