123744123 has 6 divisors (see below), whose sum is σ = 178741524. Its totient is φ = 82496076.

The previous prime is 123744113. The next prime is 123744133. The reversal of 123744123 is 321447321.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (123744113) and next prime (123744133).

It is not a de Polignac number, because 123744123 - 2⁴ = 123744107 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123744113) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6874665 + ... + 6874682.

It is an arithmetic number, because the mean of its divisors is an integer number (29790254).

Almost surely, 2^123744123 is an apocalyptic number.

123744123 is a deficient number, since it is larger than the sum of its proper divisors (54997401).

123744123 is a wasteful number, since it uses less digits than its factorization.

123744123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13749353 (or 13749350 counting only the distinct ones).

The product of its digits is 4032, while the sum is 27.

The square root of 123744123 is about 11124.0335760011. The cubic root of 123744123 is about 498.3198579022.

The spelling of 123744123 in words is "one hundred twenty-three million, seven hundred forty-four thousand, one hundred twenty-three".