123623643 has 96 divisors (see below), whose sum is σ = 218792448. Its totient is φ = 61332480.

The previous prime is 123623639. The next prime is 123623659. The reversal of 123623643 is 346326321.

It is not a de Polignac number, because 123623643 - 2² = 123623639 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 123623643.

It is not an unprimeable number, because it can be changed into a prime (123623693) 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 95 ways as a sum of consecutive naturals, for example, 1845096 + ... + 1845162.

It is an arithmetic number, because the mean of its divisors is an integer number (2279088).

Almost surely, 2^123623643 is an apocalyptic number.

123623643 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

123623643 is a deficient number, since it is larger than the sum of its proper divisors (95168805).

123623643 is a wasteful number, since it uses less digits than its factorization.

123623643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145 (or 134 counting only the distinct ones).

The product of its digits is 15552, while the sum is 30.

The square root of 123623643 is about 11118.6169553592. The cubic root of 123623643 is about 498.1580803292.

Adding to 123623643 its reverse (346326321), we get a palindrome (469949964).

The spelling of 123623643 in words is "one hundred twenty-three million, six hundred twenty-three thousand, six hundred forty-three".