206980511 has 4 divisors (see below), whose sum is σ = 214117800. Its totient is φ = 199843224.

The previous prime is 206980507. The next prime is 206980513. The reversal of 206980511 is 115089602.

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 206980511 - 2² = 206980507 is a prime.

It is a super-2 number, since 2×206980511² = 85681863867642242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206980513) 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, 3568601 + ... + 3568658.

It is an arithmetic number, because the mean of its divisors is an integer number (53529450).

Almost surely, 2^206980511 is an apocalyptic number.

206980511 is a deficient number, since it is larger than the sum of its proper divisors (7137289).

206980511 is an equidigital number, since it uses as much as digits as its factorization.

206980511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7137288.

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 206980511 is about 14386.8172644265. The cubic root of 206980511 is about 591.5296046816.

The spelling of 206980511 in words is "two hundred six million, nine hundred eighty thousand, five hundred eleven".