123328643 has 2 divisors, whose sum is σ = 123328644. Its totient is φ = 123328642.

The previous prime is 123328631. The next prime is 123328649. The reversal of 123328643 is 346823321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 123328643 - 2¹⁰ = 123327619 is a prime.

It is not a weakly prime, because it can be changed into another prime (123328649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61664321 + 61664322.

It is an arithmetic number, because the mean of its divisors is an integer number (61664322).

Almost surely, 2^123328643 is an apocalyptic number.

123328643 is a deficient number, since it is larger than the sum of its proper divisors (1).

123328643 is an equidigital number, since it uses as much as digits as its factorization.

123328643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20736, while the sum is 32.

The square root of 123328643 is about 11105.3429933523. The cubic root of 123328643 is about 497.7615173463.

The spelling of 123328643 in words is "one hundred twenty-three million, three hundred twenty-eight thousand, six hundred forty-three".