206972239 has 4 divisors (see below), whose sum is σ = 215971056. Its totient is φ = 197973424.

The previous prime is 206972209. The next prime is 206972243. The reversal of 206972239 is 932279602.

206972239 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 206972239 - 2¹¹ = 206970191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206972209) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4499374 + ... + 4499419.

It is an arithmetic number, because the mean of its divisors is an integer number (53992764).

Almost surely, 2^206972239 is an apocalyptic number.

206972239 is a deficient number, since it is larger than the sum of its proper divisors (8998817).

206972239 is an equidigital number, since it uses as much as digits as its factorization.

206972239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8998816.

The product of its (nonzero) digits is 81648, while the sum is 40.

The square root of 206972239 is about 14386.5297761482. The cubic root of 206972239 is about 591.5217243937.

The spelling of 206972239 in words is "two hundred six million, nine hundred seventy-two thousand, two hundred thirty-nine".