206997297 has 16 divisors (see below), whose sum is σ = 298572288. Its totient is φ = 126806400.

The previous prime is 206997289. The next prime is 206997299. The reversal of 206997297 is 792799602.

It is not a de Polignac number, because 206997297 - 2³ = 206997289 is a prime.

It is not an unprimeable number, because it can be changed into a prime (206997299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3204 + ... + 20597.

It is an arithmetic number, because the mean of its divisors is an integer number (18660768).

Almost surely, 2^206997297 is an apocalyptic number.

It is an amenable number.

206997297 is a deficient number, since it is larger than the sum of its proper divisors (91574991).

206997297 is a wasteful number, since it uses less digits than its factorization.

206997297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24040.

The product of its (nonzero) digits is 857304, while the sum is 51.

The square root of 206997297 is about 14387.4006338880. The cubic root of 206997297 is about 591.5455951526.

The spelling of 206997297 in words is "two hundred six million, nine hundred ninety-seven thousand, two hundred ninety-seven".