123247039 has 4 divisors (see below), whose sum is σ = 123269256. Its totient is φ = 123224824.

The previous prime is 123246973. The next prime is 123247043. The reversal of 123247039 is 930742321.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 930742321 = 11177 ⋅83273.

It is a cyclic number.

It is not a de Polignac number, because 123247039 - 2⁷ = 123246911 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 123247039.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123247079) 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 in 3 ways as a sum of consecutive naturals, for example, 4992 + ... + 16474.

It is an arithmetic number, because the mean of its divisors is an integer number (30817314).

Almost surely, 2^123247039 is an apocalyptic number.

123247039 is a deficient number, since it is larger than the sum of its proper divisors (22217).

123247039 is a wasteful number, since it uses less digits than its factorization.

123247039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22216.

The product of its (nonzero) digits is 9072, while the sum is 31.

The square root of 123247039 is about 11101.6682980532. The cubic root of 123247039 is about 497.6517069725.

The spelling of 123247039 in words is "one hundred twenty-three million, two hundred forty-seven thousand, thirty-nine".