206880971 has 4 divisors (see below), whose sum is σ = 225688344. Its totient is φ = 188073600.

The previous prime is 206880967. The next prime is 206880979. The reversal of 206880971 is 179088602.

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

It is not a de Polignac number, because 206880971 - 2² = 206880967 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206880979) 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, 9403670 + ... + 9403691.

It is an arithmetic number, because the mean of its divisors is an integer number (56422086).

Almost surely, 2^206880971 is an apocalyptic number.

206880971 is a deficient number, since it is larger than the sum of its proper divisors (18807373).

206880971 is a wasteful number, since it uses less digits than its factorization.

206880971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18807372.

The product of its (nonzero) digits is 48384, while the sum is 41.

The square root of 206880971 is about 14383.3574314205. The cubic root of 206880971 is about 591.4347643543.

The spelling of 206880971 in words is "two hundred six million, eight hundred eighty thousand, nine hundred seventy-one".