199989263 has 2 divisors, whose sum is σ = 199989264. Its totient is φ = 199989262.

The previous prime is 199989239. The next prime is 199989281. The reversal of 199989263 is 362989991.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 199989263 - 2⁸ = 199989007 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 199989199 and 199989208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199689263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99994631 + 99994632.

It is an arithmetic number, because the mean of its divisors is an integer number (99994632).

Almost surely, 2^199989263 is an apocalyptic number.

199989263 is a deficient number, since it is larger than the sum of its proper divisors (1).

199989263 is an equidigital number, since it uses as much as digits as its factorization.

199989263 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1889568, while the sum is 56.

The square root of 199989263 is about 14141.7560083605. The cubic root of 199989263 is about 584.7930823958.

The spelling of 199989263 in words is "one hundred ninety-nine million, nine hundred eighty-nine thousand, two hundred sixty-three".