199109663 has 2 divisors, whose sum is σ = 199109664. Its totient is φ = 199109662.

The previous prime is 199109633. The next prime is 199109681. The reversal of 199109663 is 366901991.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-199109663 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199109633) 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, 99554831 + 99554832.

It is an arithmetic number, because the mean of its divisors is an integer number (99554832).

Almost surely, 2^199109663 is an apocalyptic number.

199109663 is a deficient number, since it is larger than the sum of its proper divisors (1).

199109663 is an equidigital number, since it uses as much as digits as its factorization.

199109663 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 78732, while the sum is 44.

The square root of 199109663 is about 14110.6223463035. The cubic root of 199109663 is about 583.9344696832.

The spelling of 199109663 in words is "one hundred ninety-nine million, one hundred nine thousand, six hundred sixty-three".