123668971 has 4 divisors (see below), whose sum is σ = 125058600. Its totient is φ = 122279344.

The previous prime is 123668969. The next prime is 123668983. The reversal of 123668971 is 179866321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 179866321 = 47 ⋅3826943.

It is a cyclic number.

It is not a de Polignac number, because 123668971 - 2¹ = 123668969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123668471) 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, 694681 + ... + 694858.

It is an arithmetic number, because the mean of its divisors is an integer number (31264650).

Almost surely, 2^123668971 is an apocalyptic number.

123668971 is a deficient number, since it is larger than the sum of its proper divisors (1389629).

123668971 is an equidigital number, since it uses as much as digits as its factorization.

123668971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1389628.

The product of its digits is 108864, while the sum is 43.

The square root of 123668971 is about 11120.6551515637. The cubic root of 123668971 is about 498.2189579782.

It can be divided in two parts, 1236 and 68971, that added together give a palindrome (70207).

The spelling of 123668971 in words is "one hundred twenty-three million, six hundred sixty-eight thousand, nine hundred seventy-one".