123313187 has 2 divisors, whose sum is σ = 123313188. Its totient is φ = 123313186.

The previous prime is 123313181. The next prime is 123313213. The reversal of 123313187 is 781313321.

It is a weak prime.

It is an emirp because it is prime and its reverse (781313321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 123313187 - 2¹⁸ = 123051043 is a prime.

It is a super-2 number, since 2×123313187² = 30412284176193938, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (123313181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61656593 + 61656594.

It is an arithmetic number, because the mean of its divisors is an integer number (61656594).

Almost surely, 2^123313187 is an apocalyptic number.

123313187 is a deficient number, since it is larger than the sum of its proper divisors (1).

123313187 is an equidigital number, since it uses as much as digits as its factorization.

123313187 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3024, while the sum is 29.

The square root of 123313187 is about 11104.6470902951. The cubic root of 123313187 is about 497.7407227084.

The spelling of 123313187 in words is "one hundred twenty-three million, three hundred thirteen thousand, one hundred eighty-seven".