123328639 has 12 divisors (see below), whose sum is σ = 151015800. Its totient is φ = 100145808.

The previous prime is 123328631. The next prime is 123328643. The reversal of 123328639 is 936823321.

It is not a de Polignac number, because 123328639 - 2³ = 123328631 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 123328598 and 123328607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123328631) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 65304 + ... + 67165.

It is an arithmetic number, because the mean of its divisors is an integer number (12584650).

Almost surely, 2^123328639 is an apocalyptic number.

123328639 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

123328639 is a deficient number, since it is larger than the sum of its proper divisors (27687161).

123328639 is a wasteful number, since it uses less digits than its factorization.

123328639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132502 (or 132495 counting only the distinct ones).

The product of its digits is 46656, while the sum is 37.

The square root of 123328639 is about 11105.3428132589. The cubic root of 123328639 is about 497.7615119649.

The spelling of 123328639 in words is "one hundred twenty-three million, three hundred twenty-eight thousand, six hundred thirty-nine".