123309969687 has 12 divisors (see below), whose sum is σ = 178133314320. Its totient is φ = 82197917088.

The previous prime is 123309969683. The next prime is 123309969737. The reversal of 123309969687 is 786969903321.

It is not a de Polignac number, because 123309969687 - 2² = 123309969683 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123309969683) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 637398 + ... + 808019.

It is an arithmetic number, because the mean of its divisors is an integer number (14844442860).

Almost surely, 2^123309969687 is an apocalyptic number.

123309969687 is a deficient number, since it is larger than the sum of its proper divisors (54823344633).

123309969687 is a wasteful number, since it uses less digits than its factorization.

123309969687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1454902 (or 1454899 counting only the distinct ones).

The product of its (nonzero) digits is 26453952, while the sum is 63.

The spelling of 123309969687 in words is "one hundred twenty-three billion, three hundred nine million, nine hundred sixty-nine thousand, six hundred eighty-seven".