123813871 has 2 divisors, whose sum is σ = 123813872. Its totient is φ = 123813870.

The previous prime is 123813869. The next prime is 123813901. The reversal of 123813871 is 178318321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123813871 - 2¹ = 123813869 is a prime.

Together with 123813869, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123813841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61906935 + 61906936.

It is an arithmetic number, because the mean of its divisors is an integer number (61906936).

Almost surely, 2^123813871 is an apocalyptic number.

123813871 is a deficient number, since it is larger than the sum of its proper divisors (1).

123813871 is an equidigital number, since it uses as much as digits as its factorization.

123813871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8064, while the sum is 34.

The square root of 123813871 is about 11127.1681482756. The cubic root of 123813871 is about 498.4134658098.

The spelling of 123813871 in words is "one hundred twenty-three million, eight hundred thirteen thousand, eight hundred seventy-one".