199847663 has 2 divisors, whose sum is σ = 199847664. Its totient is φ = 199847662.

The previous prime is 199847629. The next prime is 199847723. The reversal of 199847663 is 366748991.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 199847663 - 2²⁰ = 198799087 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199847603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99923831 + 99923832.

It is an arithmetic number, because the mean of its divisors is an integer number (99923832).

Almost surely, 2^199847663 is an apocalyptic number.

199847663 is a deficient number, since it is larger than the sum of its proper divisors (1).

199847663 is an equidigital number, since it uses as much as digits as its factorization.

199847663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1959552, while the sum is 53.

The square root of 199847663 is about 14136.7486714591. The cubic root of 199847663 is about 584.6550312319.

The spelling of 199847663 in words is "one hundred ninety-nine million, eight hundred forty-seven thousand, six hundred sixty-three".