199550149 has 2 divisors, whose sum is σ = 199550150. Its totient is φ = 199550148.

The previous prime is 199550123. The next prime is 199550171. The reversal of 199550149 is 941055991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 179747649 + 19802500 = 13407^2 + 4450^2 .

It is a cyclic number.

It is not a de Polignac number, because 199550149 - 2²³ = 191161541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199550249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99775074 + 99775075.

It is an arithmetic number, because the mean of its divisors is an integer number (99775075).

Almost surely, 2^199550149 is an apocalyptic number.

It is an amenable number.

199550149 is a deficient number, since it is larger than the sum of its proper divisors (1).

199550149 is an equidigital number, since it uses as much as digits as its factorization.

199550149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72900, while the sum is 43.

The square root of 199550149 is about 14126.2220356329. Note that the first 3 decimals coincide. The cubic root of 199550149 is about 584.3647610625.

The spelling of 199550149 in words is "one hundred ninety-nine million, five hundred fifty thousand, one hundred forty-nine".