123609656 has 16 divisors (see below), whose sum is σ = 231906240. Its totient is φ = 61768000.

The previous prime is 123609653. The next prime is 123609667. The reversal of 123609656 is 656906321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123609653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14156 + ... + 21156.

It is an arithmetic number, because the mean of its divisors is an integer number (14494140).

Almost surely, 2^123609656 is an apocalyptic number.

It is an amenable number.

123609656 is a deficient number, since it is larger than the sum of its proper divisors (108296584).

123609656 is a wasteful number, since it uses less digits than its factorization.

123609656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9214 (or 9210 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 38.

The square root of 123609656 is about 11117.9879474660. The cubic root of 123609656 is about 498.1392921220.

The spelling of 123609656 in words is "one hundred twenty-three million, six hundred nine thousand, six hundred fifty-six".