123643099 has 2 divisors, whose sum is σ = 123643100. Its totient is φ = 123643098.

The previous prime is 123643067. The next prime is 123643109. The reversal of 123643099 is 990346321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 123643099 - 2⁵ = 123643067 is a prime.

It is not a weakly prime, because it can be changed into another prime (123643049) 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, 61821549 + 61821550.

It is an arithmetic number, because the mean of its divisors is an integer number (61821550).

Almost surely, 2^123643099 is an apocalyptic number.

123643099 is a deficient number, since it is larger than the sum of its proper divisors (1).

123643099 is an equidigital number, since it uses as much as digits as its factorization.

123643099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34992, while the sum is 37.

The square root of 123643099 is about 11119.4918499003. The cubic root of 123643099 is about 498.1842124804.

The spelling of 123643099 in words is "one hundred twenty-three million, six hundred forty-three thousand, ninety-nine".