206687087 has 2 divisors, whose sum is σ = 206687088. Its totient is φ = 206687086.

The previous prime is 206687053. The next prime is 206687101. The reversal of 206687087 is 780786602.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 206687087 - 2¹⁸ = 206424943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206686087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103343543 + 103343544.

It is an arithmetic number, because the mean of its divisors is an integer number (103343544).

Almost surely, 2^206687087 is an apocalyptic number.

206687087 is a deficient number, since it is larger than the sum of its proper divisors (1).

206687087 is an equidigital number, since it uses as much as digits as its factorization.

206687087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 225792, while the sum is 44.

The square root of 206687087 is about 14376.6159787344. The cubic root of 206687087 is about 591.2499470043.

The spelling of 206687087 in words is "two hundred six million, six hundred eighty-seven thousand, eighty-seven".