199148549 has 2 divisors, whose sum is σ = 199148550. Its totient is φ = 199148548.

The previous prime is 199148533. The next prime is 199148563. The reversal of 199148549 is 945841991.

199148549 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 147452449 + 51696100 = 12143^2 + 7190^2 .

It is an emirp because it is prime and its reverse (945841991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 199148549 - 2⁴ = 199148533 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 199148497 and 199148506.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199148569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99574274 + 99574275.

It is an arithmetic number, because the mean of its divisors is an integer number (99574275).

Almost surely, 2^199148549 is an apocalyptic number.

It is an amenable number.

199148549 is a deficient number, since it is larger than the sum of its proper divisors (1).

199148549 is an equidigital number, since it uses as much as digits as its factorization.

199148549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 466560, while the sum is 50.

The square root of 199148549 is about 14112.0001771542. Note that the first 3 decimals coincide. The cubic root of 199148549 is about 583.9724812282.

The spelling of 199148549 in words is "one hundred ninety-nine million, one hundred forty-eight thousand, five hundred forty-nine".