199879663 has 2 divisors, whose sum is σ = 199879664. Its totient is φ = 199879662.

The previous prime is 199879627. The next prime is 199879699. The reversal of 199879663 is 366978991.

It is a balanced prime because it is at equal distance from previous prime (199879627) and next prime (199879699).

It is a cyclic number.

It is not a de Polignac number, because 199879663 - 2⁹ = 199879151 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 199879598 and 199879607.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199879063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99939831 + 99939832.

It is an arithmetic number, because the mean of its divisors is an integer number (99939832).

Almost surely, 2^199879663 is an apocalyptic number.

199879663 is a deficient number, since it is larger than the sum of its proper divisors (1).

199879663 is an equidigital number, since it uses as much as digits as its factorization.

199879663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4408992, while the sum is 58.

The square root of 199879663 is about 14137.8804281264. The cubic root of 199879663 is about 584.6862349368.

The spelling of 199879663 in words is "one hundred ninety-nine million, eight hundred seventy-nine thousand, six hundred sixty-three".