209120229 has 6 divisors (see below), whose sum is σ = 302062566. Its totient is φ = 139413480.

The previous prime is 209120227. The next prime is 209120231. The reversal of 209120229 is 922021902.

It is an interprime number because it is at equal distance from previous prime (209120227) and next prime (209120231).

It can be written as a sum of positive squares in only one way, i.e., 199572129 + 9548100 = 14127^2 + 3090^2 .

It is not a de Polignac number, because 209120229 - 2¹ = 209120227 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209120221) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11617782 + ... + 11617799.

It is an arithmetic number, because the mean of its divisors is an integer number (50343761).

Almost surely, 2^209120229 is an apocalyptic number.

It is an amenable number.

209120229 is a deficient number, since it is larger than the sum of its proper divisors (92942337).

209120229 is a wasteful number, since it uses less digits than its factorization.

209120229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23235587 (or 23235584 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 209120229 is about 14460.9899038759. The cubic root of 209120229 is about 593.5609873861.

The spelling of 209120229 in words is "two hundred nine million, one hundred twenty thousand, two hundred twenty-nine".