123287039 has 4 divisors (see below), whose sum is σ = 125308200. Its totient is φ = 121265880.

The previous prime is 123287011. The next prime is 123287051. The reversal of 123287039 is 930782321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 930782321 = 7 ⋅132968903.

It is a cyclic number.

It is not a de Polignac number, because 123287039 - 2¹⁶ = 123221503 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123287539) 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, 1010489 + ... + 1010610.

It is an arithmetic number, because the mean of its divisors is an integer number (31327050).

Almost surely, 2^123287039 is an apocalyptic number.

123287039 is a deficient number, since it is larger than the sum of its proper divisors (2021161).

123287039 is an equidigital number, since it uses as much as digits as its factorization.

123287039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2021160.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 123287039 is about 11103.4696829415. The cubic root of 123287039 is about 497.7055390032.

The spelling of 123287039 in words is "one hundred twenty-three million, two hundred eighty-seven thousand, thirty-nine".