123645992 has 16 divisors (see below), whose sum is σ = 232860960. Its totient is φ = 61549744.

The previous prime is 123645967. The next prime is 123646007. The reversal of 123645992 is 299546321.

It is an unprimeable number.

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, 32228 + ... + 35859.

It is an arithmetic number, because the mean of its divisors is an integer number (14553810).

Almost surely, 2^123645992 is an apocalyptic number.

It is an amenable number.

123645992 is a deficient number, since it is larger than the sum of its proper divisors (109214968).

123645992 is a wasteful number, since it uses less digits than its factorization.

123645992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68320 (or 68316 counting only the distinct ones).

The product of its digits is 116640, while the sum is 41.

The square root of 123645992 is about 11119.6219360192. The cubic root of 123645992 is about 498.1880979532.

The spelling of 123645992 in words is "one hundred twenty-three million, six hundred forty-five thousand, nine hundred ninety-two".