209729050 has 12 divisors (see below), whose sum is σ = 390096126. Its totient is φ = 83891600.

The previous prime is 209729033. The next prime is 209729059. The reversal of 209729050 is 50927902.

It can be written as a sum of positive squares in 3 ways, for example, as 199289689 + 10439361 = 14117^2 + 3231^2 .

It is a junction number, because it is equal to n+sod(n) for n = 209728997 and 209729015.

It is not an unprimeable number, because it can be changed into a prime (209729059) 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, 2097241 + ... + 2097340.

Almost surely, 2^209729050 is an apocalyptic number.

209729050 is a deficient number, since it is larger than the sum of its proper divisors (180367076).

209729050 is a wasteful number, since it uses less digits than its factorization.

209729050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4194593 (or 4194588 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 34.

The square root of 209729050 is about 14482.0250655770. The cubic root of 209729050 is about 594.1364494358.

The spelling of 209729050 in words is "two hundred nine million, seven hundred twenty-nine thousand, fifty".