123487866 has 12 divisors (see below), whose sum is σ = 267557082. Its totient is φ = 41162616.

The previous prime is 123487843. The next prime is 123487867. The reversal of 123487866 is 668784321.

It can be written as a sum of positive squares in only one way, i.e., 89019225 + 34468641 = 9435^2 + 5871^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (123487867) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3430201 + ... + 3430236.

Almost surely, 2^123487866 is an apocalyptic number.

123487866 is an abundant number, since it is smaller than the sum of its proper divisors (144069216).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123487866 is a wasteful number, since it uses less digits than its factorization.

123487866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6860445 (or 6860442 counting only the distinct ones).

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

The square root of 123487866 is about 11112.5094375663. The cubic root of 123487866 is about 497.9756362978.

The spelling of 123487866 in words is "one hundred twenty-three million, four hundred eighty-seven thousand, eight hundred sixty-six".