123868187 has 2 divisors, whose sum is σ = 123868188. Its totient is φ = 123868186.

The previous prime is 123868177. The next prime is 123868189. The reversal of 123868187 is 781868321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 123868187 - 2²⁶ = 56759323 is a prime.

Together with 123868189, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (123868189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61934093 + 61934094.

It is an arithmetic number, because the mean of its divisors is an integer number (61934094).

Almost surely, 2^123868187 is an apocalyptic number.

123868187 is a deficient number, since it is larger than the sum of its proper divisors (1).

123868187 is an equidigital number, since it uses as much as digits as its factorization.

123868187 is an evil number, because the sum of its binary digits is even.

The product of its digits is 129024, while the sum is 44.

The square root of 123868187 is about 11129.6085735303. The cubic root of 123868187 is about 498.4863382805.

The spelling of 123868187 in words is "one hundred twenty-three million, eight hundred sixty-eight thousand, one hundred eighty-seven".