123686587 has 8 divisors (see below), whose sum is σ = 125452800. Its totient is φ = 121925544.

The previous prime is 123686581. The next prime is 123686603. The reversal of 123686587 is 785686321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 123686587 - 2³ = 123686579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123686581) 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 in 7 ways as a sum of consecutive naturals, for example, 93114 + ... + 94432.

It is an arithmetic number, because the mean of its divisors is an integer number (15681600).

Almost surely, 2^123686587 is an apocalyptic number.

123686587 is a deficient number, since it is larger than the sum of its proper divisors (1766213).

123686587 is a wasteful number, since it uses less digits than its factorization.

123686587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2585.

The product of its digits is 483840, while the sum is 46.

The square root of 123686587 is about 11121.4471630269. The cubic root of 123686587 is about 498.2426130858.

The spelling of 123686587 in words is "one hundred twenty-three million, six hundred eighty-six thousand, five hundred eighty-seven".