199180123 has 2 divisors, whose sum is σ = 199180124. Its totient is φ = 199180122.

The previous prime is 199180117. The next prime is 199180127. The reversal of 199180123 is 321081991.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-199180123 is a prime.

It is not a weakly prime, because it can be changed into another prime (199180127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99590061 + 99590062.

It is an arithmetic number, because the mean of its divisors is an integer number (99590062).

Almost surely, 2^199180123 is an apocalyptic number.

199180123 is a deficient number, since it is larger than the sum of its proper divisors (1).

199180123 is an equidigital number, since it uses as much as digits as its factorization.

199180123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 34.

The square root of 199180123 is about 14113.1188261135. The cubic root of 199180123 is about 584.0033415631.

The spelling of 199180123 in words is "one hundred ninety-nine million, one hundred eighty thousand, one hundred twenty-three".