206987 has 8 divisors (see below), whose sum is σ = 233472. Its totient is φ = 181800.

The previous prime is 206953. The next prime is 206993. The reversal of 206987 is 789602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 206987 - 2⁶ = 206923 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 206987.

It is not an unprimeable number, because it can be changed into a prime (206917) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38 + ... + 644.

It is an arithmetic number, because the mean of its divisors is an integer number (29184).

2²⁰⁶⁹⁸⁷ is an apocalyptic number.

206987 is a deficient number, since it is larger than the sum of its proper divisors (26485).

206987 is a wasteful number, since it uses less digits than its factorization.

206987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 206987 is about 454.9582398419. The cubic root of 206987 is about 59.1535786255.

It can be divided in two parts, 20 and 6987, that added together give a palindrome (7007).

The spelling of 206987 in words is "two hundred six thousand, nine hundred eighty-seven".