1229947123 has 2 divisors, whose sum is σ = 1229947124. Its totient is φ = 1229947122.

The previous prime is 1229947067. The next prime is 1229947141. The reversal of 1229947123 is 3217499221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1229947123 - 2⁹ = 1229946611 is a prime.

It is not a weakly prime, because it can be changed into another prime (1229917123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 614973561 + 614973562.

It is an arithmetic number, because the mean of its divisors is an integer number (614973562).

Almost surely, 2^1229947123 is an apocalyptic number.

1229947123 is a deficient number, since it is larger than the sum of its proper divisors (1).

1229947123 is an equidigital number, since it uses as much as digits as its factorization.

1229947123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 40.

The square root of 1229947123 is about 35070.6019765843. The cubic root of 1229947123 is about 1071.4259159206.

The spelling of 1229947123 in words is "one billion, two hundred twenty-nine million, nine hundred forty-seven thousand, one hundred twenty-three".