123100243 has 4 divisors (see below), whose sum is σ = 140686000. Its totient is φ = 105514488.

The previous prime is 123100231. The next prime is 123100253. The reversal of 123100243 is 342001321.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 123100243 - 2²⁵ = 89545811 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123100223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8792868 + ... + 8792881.

It is an arithmetic number, because the mean of its divisors is an integer number (35171500).

Almost surely, 2^123100243 is an apocalyptic number.

123100243 is a deficient number, since it is larger than the sum of its proper divisors (17585757).

123100243 is an equidigital number, since it uses as much as digits as its factorization.

123100243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17585756.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 123100243 is about 11095.0548894541. The cubic root of 123100243 is about 497.4540489364.

Adding to 123100243 its reverse (342001321), we get a palindrome (465101564).

The spelling of 123100243 in words is "one hundred twenty-three million, one hundred thousand, two hundred forty-three".