123424617187 has 4 divisors (see below), whose sum is σ = 123473002576. Its totient is φ = 123376231800.

The previous prime is 123424617079. The next prime is 123424617227. The reversal of 123424617187 is 781716424321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 781716424321 = 7 ⋅111673774903.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123424617187 is a prime.

It is a super-2 number, since 2×123424617187² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123424612187) 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, 24188868 + ... + 24193969.

It is an arithmetic number, because the mean of its divisors is an integer number (30868250644).

Almost surely, 2^123424617187 is an apocalyptic number.

123424617187 is a deficient number, since it is larger than the sum of its proper divisors (48385389).

123424617187 is an equidigital number, since it uses as much as digits as its factorization.

123424617187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48385388.

The product of its digits is 451584, while the sum is 46.

The spelling of 123424617187 in words is "one hundred twenty-three billion, four hundred twenty-four million, six hundred seventeen thousand, one hundred eighty-seven".