123249208707 has 6 divisors (see below), whose sum is σ = 178026634812. Its totient is φ = 82166139132.

The previous prime is 123249208679. The next prime is 123249208711. The reversal of 123249208707 is 707802942321.

It is not a de Polignac number, because 123249208707 - 2¹¹ = 123249206659 is a prime.

It is a super-2 number, since 2×123249208707² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (123249208717) 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 5 ways as a sum of consecutive naturals, for example, 6847178253 + ... + 6847178270.

It is an arithmetic number, because the mean of its divisors is an integer number (29671105802).

Almost surely, 2^123249208707 is an apocalyptic number.

123249208707 is a deficient number, since it is larger than the sum of its proper divisors (54777426105).

123249208707 is a wasteful number, since it uses less digits than its factorization.

123249208707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13694356529 (or 13694356526 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The spelling of 123249208707 in words is "one hundred twenty-three billion, two hundred forty-nine million, two hundred eight thousand, seven hundred seven".