123618587 has 2 divisors, whose sum is σ = 123618588. Its totient is φ = 123618586.

The previous prime is 123618581. The next prime is 123618613. The reversal of 123618587 is 785816321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123618587 - 2⁴ = 123618571 is a prime.

It is a Chen prime.

It is an alternating number because its digits alternate between odd and even.

It is not a weakly prime, because it can be changed into another prime (123618581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61809293 + 61809294.

It is an arithmetic number, because the mean of its divisors is an integer number (61809294).

Almost surely, 2^123618587 is an apocalyptic number.

123618587 is a deficient number, since it is larger than the sum of its proper divisors (1).

123618587 is an equidigital number, since it uses as much as digits as its factorization.

123618587 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 80640, while the sum is 41.

The square root of 123618587 is about 11118.3895866263. The cubic root of 123618587 is about 498.1512889595.

The spelling of 123618587 in words is "one hundred twenty-three million, six hundred eighteen thousand, five hundred eighty-seven".