206982987 has 16 divisors (see below), whose sum is σ = 278422560. Its totient is φ = 136772352.

The previous prime is 206982983. The next prime is 206983019. The reversal of 206982987 is 789289602.

It is a happy number.

It is not a de Polignac number, because 206982987 - 2² = 206982983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (206982983) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 193089 + ... + 194157.

It is an arithmetic number, because the mean of its divisors is an integer number (17401410).

Almost surely, 2^206982987 is an apocalyptic number.

206982987 is a deficient number, since it is larger than the sum of its proper divisors (71439573).

206982987 is a wasteful number, since it uses less digits than its factorization.

206982987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1582.

The product of its (nonzero) digits is 870912, while the sum is 51.

The square root of 206982987 is about 14386.9033151683. The cubic root of 206982987 is about 591.5319633924.

The spelling of 206982987 in words is "two hundred six million, nine hundred eighty-two thousand, nine hundred eighty-seven".