206972291 has 2 divisors, whose sum is σ = 206972292. Its totient is φ = 206972290.

The previous prime is 206972273. The next prime is 206972299. The reversal of 206972291 is 192279602.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 206972291 - 2¹⁰ = 206971267 is a prime.

It is a super-3 number, since 3×206972291³ (a number of 26 digits) contains 333 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (206972299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103486145 + 103486146.

It is an arithmetic number, because the mean of its divisors is an integer number (103486146).

Almost surely, 2^206972291 is an apocalyptic number.

206972291 is a deficient number, since it is larger than the sum of its proper divisors (1).

206972291 is an equidigital number, since it uses as much as digits as its factorization.

206972291 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 206972291 is about 14386.5315833942. The cubic root of 206972291 is about 591.5217739320.

The spelling of 206972291 in words is "two hundred six million, nine hundred seventy-two thousand, two hundred ninety-one".