123100643 has 2 divisors, whose sum is σ = 123100644. Its totient is φ = 123100642.

The previous prime is 123100633. The next prime is 123100651. The reversal of 123100643 is 346001321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 123100643 - 2⁸ = 123100387 is a prime.

It is not a weakly prime, because it can be changed into another prime (123100633) 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 as a sum of consecutive naturals, namely, 61550321 + 61550322.

It is an arithmetic number, because the mean of its divisors is an integer number (61550322).

Almost surely, 2^123100643 is an apocalyptic number.

123100643 is a deficient number, since it is larger than the sum of its proper divisors (1).

123100643 is an equidigital number, since it uses as much as digits as its factorization.

123100643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 123100643 is about 11095.0729154882. The cubic root of 123100643 is about 497.4545877423.

Adding to 123100643 its reverse (346001321), we get a palindrome (469101964).

The spelling of 123100643 in words is "one hundred twenty-three million, one hundred thousand, six hundred forty-three".