123648733 has 4 divisors (see below), whose sum is σ = 133160188. Its totient is φ = 114137280.

The previous prime is 123648727. The next prime is 123648737. The reversal of 123648733 is 337846321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 337846321 = 17 ⋅19873313.

It can be written as a sum of positive squares in 2 ways, for example, as 19873764 + 103774969 = 4458^2 + 10187^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123648733 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123648692 and 123648701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123648737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4755708 + ... + 4755733.

It is an arithmetic number, because the mean of its divisors is an integer number (33290047).

Almost surely, 2^123648733 is an apocalyptic number.

123648733 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

123648733 is a deficient number, since it is larger than the sum of its proper divisors (9511455).

123648733 is an equidigital number, since it uses as much as digits as its factorization.

123648733 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9511454.

The product of its digits is 72576, while the sum is 37.

The square root of 123648733 is about 11119.7451859294. The cubic root of 123648733 is about 498.1917792250.

The spelling of 123648733 in words is "one hundred twenty-three million, six hundred forty-eight thousand, seven hundred thirty-three".