123712871 has 2 divisors, whose sum is σ = 123712872. Its totient is φ = 123712870.

The previous prime is 123712829. The next prime is 123712873. The reversal of 123712871 is 178217321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 123712871 - 2¹⁴ = 123696487 is a prime.

Together with 123712873, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123712873) 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, 61856435 + 61856436.

It is an arithmetic number, because the mean of its divisors is an integer number (61856436).

Almost surely, 2^123712871 is an apocalyptic number.

123712871 is a deficient number, since it is larger than the sum of its proper divisors (1).

123712871 is an equidigital number, since it uses as much as digits as its factorization.

123712871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4704, while the sum is 32.

The square root of 123712871 is about 11122.6287810032. The cubic root of 123712871 is about 498.2779035773.

The spelling of 123712871 in words is "one hundred twenty-three million, seven hundred twelve thousand, eight hundred seventy-one".