123648913 has 2 divisors, whose sum is σ = 123648914. Its totient is φ = 123648912.

The previous prime is 123648911. The next prime is 123648919. The reversal of 123648913 is 319846321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62995969 + 60652944 = 7937^2 + 7788^2 .

It is a cyclic number.

It is not a de Polignac number, because 123648913 - 2¹ = 123648911 is a prime.

Together with 123648911, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (123648911) 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, 61824456 + 61824457.

It is an arithmetic number, because the mean of its divisors is an integer number (61824457).

Almost surely, 2^123648913 is an apocalyptic number.

It is an amenable number.

123648913 is a deficient number, since it is larger than the sum of its proper divisors (1).

123648913 is an equidigital number, since it uses as much as digits as its factorization.

123648913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 37.

The square root of 123648913 is about 11119.7532796371. The cubic root of 123648913 is about 498.1920209702.

The spelling of 123648913 in words is "one hundred twenty-three million, six hundred forty-eight thousand, nine hundred thirteen".