209080269 has 6 divisors (see below), whose sum is σ = 302004846. Its totient is φ = 139386840.

The previous prime is 209080259. The next prime is 209080309. The reversal of 209080269 is 962080902.

It can be written as a sum of positive squares in only one way, i.e., 199233225 + 9847044 = 14115^2 + 3138^2 .

It is not a de Polignac number, because 209080269 - 2¹² = 209076173 is a prime.

It is a super-2 number, since 2×209080269² = 87429117770224722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209080259) 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 5 ways as a sum of consecutive naturals, for example, 11615562 + ... + 11615579.

It is an arithmetic number, because the mean of its divisors is an integer number (50334141).

Almost surely, 2^209080269 is an apocalyptic number.

It is an amenable number.

209080269 is a deficient number, since it is larger than the sum of its proper divisors (92924577).

209080269 is a wasteful number, since it uses less digits than its factorization.

209080269 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23231147 (or 23231144 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 209080269 is about 14459.6081897125. The cubic root of 209080269 is about 593.5231778636.

The spelling of 209080269 in words is "two hundred nine million, eighty thousand, two hundred sixty-nine".