123686487 has 8 divisors (see below), whose sum is σ = 183239280. Its totient is φ = 82457640.

The previous prime is 123686483. The next prime is 123686573. The reversal of 123686487 is 784686321.

It is not a de Polignac number, because 123686487 - 2² = 123686483 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123686483) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2290464 + ... + 2290517.

It is an arithmetic number, because the mean of its divisors is an integer number (22904910).

Almost surely, 2^123686487 is an apocalyptic number.

123686487 is a deficient number, since it is larger than the sum of its proper divisors (59552793).

123686487 is an equidigital number, since it uses as much as digits as its factorization.

123686487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4580990 (or 4580984 counting only the distinct ones).

The product of its digits is 387072, while the sum is 45.

The square root of 123686487 is about 11121.4426672082. The cubic root of 123686487 is about 498.2424788102.

The spelling of 123686487 in words is "one hundred twenty-three million, six hundred eighty-six thousand, four hundred eighty-seven".