209071049 has 8 divisors (see below), whose sum is σ = 241494048. Its totient is φ = 178884160.

The previous prime is 209071039. The next prime is 209071069. The reversal of 209071049 is 940170902.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 209071049 - 2¹² = 209066953 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (209071039) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 558827 + ... + 559200.

It is an arithmetic number, because the mean of its divisors is an integer number (30186756).

Almost surely, 2^209071049 is an apocalyptic number.

It is an amenable number.

209071049 is a deficient number, since it is larger than the sum of its proper divisors (32422999).

209071049 is a wasteful number, since it uses less digits than its factorization.

209071049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1118055.

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 209071049 is about 14459.2893670471. The cubic root of 209071049 is about 593.5144533609.

The spelling of 209071049 in words is "two hundred nine million, seventy-one thousand, forty-nine".