123645113 has 2 divisors, whose sum is σ = 123645114. Its totient is φ = 123645112.

The previous prime is 123645107. The next prime is 123645127. The reversal of 123645113 is 311546321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 120714169 + 2930944 = 10987^2 + 1712^2 .

It is a cyclic number.

It is not a de Polignac number, because 123645113 - 2²⁴ = 106867897 is a prime.

It is a super-2 number, since 2×123645113² = 30576227937565538, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (123645173) 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, 61822556 + 61822557.

It is an arithmetic number, because the mean of its divisors is an integer number (61822557).

Almost surely, 2^123645113 is an apocalyptic number.

It is an amenable number.

123645113 is a deficient number, since it is larger than the sum of its proper divisors (1).

123645113 is an equidigital number, since it uses as much as digits as its factorization.

123645113 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2160, while the sum is 26.

The square root of 123645113 is about 11119.5824112239. The cubic root of 123645113 is about 498.1869174098.

The spelling of 123645113 in words is "one hundred twenty-three million, six hundred forty-five thousand, one hundred thirteen".