123916243 has 4 divisors (see below), whose sum is σ = 135181368. Its totient is φ = 112651120.

The previous prime is 123916241. The next prime is 123916277. The reversal of 123916243 is 342619321.

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 123916243 - 2¹ = 123916241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123916241) 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, 5632546 + ... + 5632567.

It is an arithmetic number, because the mean of its divisors is an integer number (33795342).

Almost surely, 2^123916243 is an apocalyptic number.

123916243 is a deficient number, since it is larger than the sum of its proper divisors (11265125).

123916243 is a wasteful number, since it uses less digits than its factorization.

123916243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11265124.

The product of its digits is 7776, while the sum is 31.

The square root of 123916243 is about 11131.7672900578. The cubic root of 123916243 is about 498.5507943307.

The spelling of 123916243 in words is "one hundred twenty-three million, nine hundred sixteen thousand, two hundred forty-three".