123814109 has 2 divisors, whose sum is σ = 123814110. Its totient is φ = 123814108.

The previous prime is 123814091. The next prime is 123814133. The reversal of 123814109 is 901418321.

Together with previous prime (123814091) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 122722084 + 1092025 = 11078^2 + 1045^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123814109 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123814139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61907054 + 61907055.

It is an arithmetic number, because the mean of its divisors is an integer number (61907055).

Almost surely, 2^123814109 is an apocalyptic number.

It is an amenable number.

123814109 is a deficient number, since it is larger than the sum of its proper divisors (1).

123814109 is an equidigital number, since it uses as much as digits as its factorization.

123814109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 123814109 is about 11127.1788428155. The cubic root of 123814109 is about 498.4137851664.

The spelling of 123814109 in words is "one hundred twenty-three million, eight hundred fourteen thousand, one hundred nine".