1238167123 has 2 divisors, whose sum is σ = 1238167124. Its totient is φ = 1238167122.

The previous prime is 1238167121. The next prime is 1238167141. The reversal of 1238167123 is 3217618321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1238167123 - 2¹ = 1238167121 is a prime.

Together with 1238167121, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1238167121) 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, 619083561 + 619083562.

It is an arithmetic number, because the mean of its divisors is an integer number (619083562).

Almost surely, 2^1238167123 is an apocalyptic number.

1238167123 is a deficient number, since it is larger than the sum of its proper divisors (1).

1238167123 is an equidigital number, since it uses as much as digits as its factorization.

1238167123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12096, while the sum is 34.

The square root of 1238167123 is about 35187.5989945322. The cubic root of 1238167123 is about 1073.8074745610.

The spelling of 1238167123 in words is "one billion, two hundred thirty-eight million, one hundred sixty-seven thousand, one hundred twenty-three".