209048949 has 12 divisors (see below), whose sum is σ = 319722156. Its totient is φ = 131167872.

The previous prime is 209048941. The next prime is 209048951. The reversal of 209048949 is 949840902.

It can be written as a sum of positive squares in 2 ways, for example, as 165251025 + 43797924 = 12855^2 + 6618^2 .

It is not a de Polignac number, because 209048949 - 2³ = 209048941 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209048941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 683014 + ... + 683319.

It is an arithmetic number, because the mean of its divisors is an integer number (26643513).

Almost surely, 2^209048949 is an apocalyptic number.

It is an amenable number.

209048949 is a deficient number, since it is larger than the sum of its proper divisors (110673207).

209048949 is a wasteful number, since it uses less digits than its factorization.

209048949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1366356 (or 1366353 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The square root of 209048949 is about 14458.5251322533. The cubic root of 209048949 is about 593.4935400052.

The spelling of 209048949 in words is "two hundred nine million, forty-eight thousand, nine hundred forty-nine".