199216903 has 2 divisors, whose sum is σ = 199216904. Its totient is φ = 199216902.

The previous prime is 199216889. The next prime is 199216933. The reversal of 199216903 is 309612991.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-199216903 is a prime.

It is a super-2 number, since 2×199216903² = 79374748881822818, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199216933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99608451 + 99608452.

It is an arithmetic number, because the mean of its divisors is an integer number (99608452).

Almost surely, 2^199216903 is an apocalyptic number.

199216903 is a deficient number, since it is larger than the sum of its proper divisors (1).

199216903 is an equidigital number, since it uses as much as digits as its factorization.

199216903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26244, while the sum is 40.

The square root of 199216903 is about 14114.4218089159. The cubic root of 199216903 is about 584.0392861152.

The spelling of 199216903 in words is "one hundred ninety-nine million, two hundred sixteen thousand, nine hundred three".