209449053 has 24 divisors (see below), whose sum is σ = 333324576. Its totient is φ = 125676000.

The previous prime is 209449043. The next prime is 209449069. The reversal of 209449053 is 350944902.

209449053 is a `hidden beast` number, since 209 + 449 + 0 + 5 + 3 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-209449053 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 209448999 and 209449017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209449043) 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 23 ways as a sum of consecutive naturals, for example, 475 + ... + 20472.

It is an arithmetic number, because the mean of its divisors is an integer number (13888524).

Almost surely, 2^209449053 is an apocalyptic number.

It is an amenable number.

209449053 is a deficient number, since it is larger than the sum of its proper divisors (123875523).

209449053 is a wasteful number, since it uses less digits than its factorization.

209449053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21065 (or 21062 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 209449053 is about 14472.3547842084. The cubic root of 209449053 is about 593.8719327347.

The spelling of 209449053 in words is "two hundred nine million, four hundred forty-nine thousand, fifty-three".