123643366 has 36 divisors (see below), whose sum is σ = 237164004. Its totient is φ = 48168120.

The previous prime is 123643343. The next prime is 123643367. The reversal of 123643366 is 663346321.

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123643367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 6645 + ... + 17071.

It is an arithmetic number, because the mean of its divisors is an integer number (6587889).

Almost surely, 2^123643366 is an apocalyptic number.

123643366 is a deficient number, since it is larger than the sum of its proper divisors (113520638).

123643366 is a wasteful number, since it uses less digits than its factorization.

123643366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10465 (or 10447 counting only the distinct ones).

The product of its digits is 46656, while the sum is 34.

The square root of 123643366 is about 11119.5038558382. The cubic root of 123643366 is about 498.1845710800.

Adding to 123643366 its reverse (663346321), we get a palindrome (786989687).

The spelling of 123643366 in words is "one hundred twenty-three million, six hundred forty-three thousand, three hundred sixty-six".