124399491687 has 16 divisors (see below), whose sum is σ = 184305089280. Its totient is φ = 82928698776.

The previous prime is 124399491661. The next prime is 124399491691. The reversal of 124399491687 is 786194993421.

124399491687 is a `hidden beast` number, since 12 + 43 + 99 + 491 + 6 + 8 + 7 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-124399491687 is a prime.

It is a super-3 number, since 3×124399491687³ (a number of 34 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (124399491617) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 463318 + ... + 680780.

It is an arithmetic number, because the mean of its divisors is an integer number (11519068080).

Almost surely, 2^124399491687 is an apocalyptic number.

124399491687 is a deficient number, since it is larger than the sum of its proper divisors (59905597593).

124399491687 is a wasteful number, since it uses less digits than its factorization.

124399491687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238659 (or 238653 counting only the distinct ones).

The product of its digits is 23514624, while the sum is 63.

The spelling of 124399491687 in words is "one hundred twenty-four billion, three hundred ninety-nine million, four hundred ninety-one thousand, six hundred eighty-seven".