123240023 has 8 divisors (see below), whose sum is σ = 129918000. Its totient is φ = 116581248.

The previous prime is 123240011. The next prime is 123240043. The reversal of 123240023 is 320042321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123240023 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123239983 and 123240010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123240043) 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 7 ways as a sum of consecutive naturals, for example, 9503 + ... + 18351.

It is an arithmetic number, because the mean of its divisors is an integer number (16239750).

Almost surely, 2^123240023 is an apocalyptic number.

123240023 is a deficient number, since it is larger than the sum of its proper divisors (6677977).

123240023 is an equidigital number, since it uses as much as digits as its factorization.

123240023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9601.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 123240023 is about 11101.3523050122. The cubic root of 123240023 is about 497.6422636337.

Adding to 123240023 its reverse (320042321), we get a palindrome (443282344).

The spelling of 123240023 in words is "one hundred twenty-three million, two hundred forty thousand, twenty-three".