123648737 has 2 divisors, whose sum is σ = 123648738. Its totient is φ = 123648736.

The previous prime is 123648727. The next prime is 123648773. The reversal of 123648737 is 737846321.

Together with next prime (123648773) 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., 95335696 + 28313041 = 9764^2 + 5321^2 .

It is an emirp because it is prime and its reverse (737846321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 123648737 - 2²⁴ = 106871521 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 123648694 and 123648703.

It is not a weakly prime, because it can be changed into another prime (123648727) 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, 61824368 + 61824369.

It is an arithmetic number, because the mean of its divisors is an integer number (61824369).

Almost surely, 2^123648737 is an apocalyptic number.

It is an amenable number.

123648737 is a deficient number, since it is larger than the sum of its proper divisors (1).

123648737 is an equidigital number, since it uses as much as digits as its factorization.

123648737 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 169344, while the sum is 41.

The square root of 123648737 is about 11119.7453657896. The cubic root of 123648737 is about 498.1917845971.

The spelling of 123648737 in words is "one hundred twenty-three million, six hundred forty-eight thousand, seven hundred thirty-seven".