209670441 has 16 divisors (see below), whose sum is σ = 282252288. Its totient is φ = 138441600.

The previous prime is 209670427. The next prime is 209670463. The reversal of 209670441 is 144076902.

It is a happy number.

It is not a de Polignac number, because 209670441 - 2²⁵ = 176116009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (209670421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 158061 + ... + 159381.

It is an arithmetic number, because the mean of its divisors is an integer number (17640768).

Almost surely, 2^209670441 is an apocalyptic number.

It is an amenable number.

209670441 is a deficient number, since it is larger than the sum of its proper divisors (72581847).

209670441 is a wasteful number, since it uses less digits than its factorization.

209670441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1792.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 209670441 is about 14480.0014157458. The cubic root of 209670441 is about 594.0811002645.

The spelling of 209670441 in words is "two hundred nine million, six hundred seventy thousand, four hundred forty-one".