209948079 has 16 divisors (see below), whose sum is σ = 323343360. Its totient is φ = 119756160.

The previous prime is 209948047. The next prime is 209948083. The reversal of 209948079 is 970849902.

It is a happy number.

It is not a de Polignac number, because 209948079 - 2⁵ = 209948047 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209948029) 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, 186559 + ... + 187680.

It is an arithmetic number, because the mean of its divisors is an integer number (20208960).

Almost surely, 2^209948079 is an apocalyptic number.

209948079 is a deficient number, since it is larger than the sum of its proper divisors (113395281).

209948079 is a wasteful number, since it uses less digits than its factorization.

209948079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374270.

The product of its (nonzero) digits is 326592, while the sum is 48.

The square root of 209948079 is about 14489.5851907499. The cubic root of 209948079 is about 594.3432048304.

The spelling of 209948079 in words is "two hundred nine million, nine hundred forty-eight thousand, seventy-nine".