123005287 has 2 divisors, whose sum is σ = 123005288. Its totient is φ = 123005286.

The previous prime is 123005243. The next prime is 123005293. The reversal of 123005287 is 782500321.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123005287 is a prime.

It is a plaindrome in base 14.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123005237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61502643 + 61502644.

It is an arithmetic number, because the mean of its divisors is an integer number (61502644).

Almost surely, 2^123005287 is an apocalyptic number.

123005287 is a deficient number, since it is larger than the sum of its proper divisors (1).

123005287 is an equidigital number, since it uses as much as digits as its factorization.

123005287 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 123005287 is about 11090.7748602160. The cubic root of 123005287 is about 497.3261087680.

The spelling of 123005287 in words is "one hundred twenty-three million, five thousand, two hundred eighty-seven".