199770949 has 8 divisors (see below), whose sum is σ = 230405120. Its totient is φ = 169660656.

The previous prime is 199770943. The next prime is 199770971. The reversal of 199770949 is 949077991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 199770949 - 2³ = 199770941 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 199770949.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199770941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 130149 + ... + 131674.

It is an arithmetic number, because the mean of its divisors is an integer number (28800640).

Almost surely, 2^199770949 is an apocalyptic number.

It is an amenable number.

199770949 is a deficient number, since it is larger than the sum of its proper divisors (30634171).

199770949 is a wasteful number, since it uses less digits than its factorization.

199770949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261939.

The product of its (nonzero) digits is 1285956, while the sum is 55.

The square root of 199770949 is about 14134.0351280163. The cubic root of 199770949 is about 584.5802126334.

The spelling of 199770949 in words is "one hundred ninety-nine million, seven hundred seventy thousand, nine hundred forty-nine".