123100559 has 2 divisors, whose sum is σ = 123100560. Its totient is φ = 123100558.

The previous prime is 123100499. The next prime is 123100583. The reversal of 123100559 is 955001321.

It is a strong prime.

It is an emirp because it is prime and its reverse (955001321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 123100559 - 2⁸ = 123100303 is a prime.

It is a super-2 number, since 2×123100559² = 30307495252224962, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123100589) 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, 61550279 + 61550280.

It is an arithmetic number, because the mean of its divisors is an integer number (61550280).

Almost surely, 2^123100559 is an apocalyptic number.

123100559 is a deficient number, since it is larger than the sum of its proper divisors (1).

123100559 is an equidigital number, since it uses as much as digits as its factorization.

123100559 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1350, while the sum is 26.

The square root of 123100559 is about 11095.0691300235. The cubic root of 123100559 is about 497.4544745931.

The spelling of 123100559 in words is "one hundred twenty-three million, one hundred thousand, five hundred fifty-nine".