199145911 has 2 divisors, whose sum is σ = 199145912. Its totient is φ = 199145910.

The previous prime is 199145861. The next prime is 199145981. The reversal of 199145911 is 119541991.

It is a weak prime.

It is an emirp because it is prime and its reverse (119541991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 199145911 - 2¹⁹ = 198621623 is a prime.

It is a super-3 number, since 3×199145911³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199145981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99572955 + 99572956.

It is an arithmetic number, because the mean of its divisors is an integer number (99572956).

Almost surely, 2^199145911 is an apocalyptic number.

199145911 is a deficient number, since it is larger than the sum of its proper divisors (1).

199145911 is an equidigital number, since it uses as much as digits as its factorization.

199145911 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14580, while the sum is 40.

The square root of 199145911 is about 14111.9067102926. The cubic root of 199145911 is about 583.9699027071.

The spelling of 199145911 in words is "one hundred ninety-nine million, one hundred forty-five thousand, nine hundred eleven".