123143617 has 4 divisors (see below), whose sum is σ = 129624880. Its totient is φ = 116662356.

The previous prime is 123143611. The next prime is 123143651. The reversal of 123143617 is 716341321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-123143617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123143611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3240603 + ... + 3240640.

It is an arithmetic number, because the mean of its divisors is an integer number (32406220).

Almost surely, 2^123143617 is an apocalyptic number.

It is an amenable number.

123143617 is a deficient number, since it is larger than the sum of its proper divisors (6481263).

123143617 is an equidigital number, since it uses as much as digits as its factorization.

123143617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6481262.

The product of its digits is 3024, while the sum is 28.

The square root of 123143617 is about 11097.0093718984. The cubic root of 123143617 is about 497.5124675545.

Adding to 123143617 its reverse (716341321), we get a palindrome (839484938).

It can be divided in two parts, 12314 and 3617, that added together give a triangular number (15931 = T₁₇₈).

The spelling of 123143617 in words is "one hundred twenty-three million, one hundred forty-three thousand, six hundred seventeen".