206307087 has 32 divisors (see below), whose sum is σ = 334098432. Its totient is φ = 110544384.

The previous prime is 206307083. The next prime is 206307089. The reversal of 206307087 is 780703602.

It is not a de Polignac number, because 206307087 - 2² = 206307083 is a prime.

It is a super-2 number, since 2×206307087² = 85125228292851138, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206307083) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 112258 + ... + 114080.

It is an arithmetic number, because the mean of its divisors is an integer number (10440576).

Almost surely, 2^206307087 is an apocalyptic number.

206307087 is a deficient number, since it is larger than the sum of its proper divisors (127791345).

206307087 is a wasteful number, since it uses less digits than its factorization.

206307087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2167.

The product of its (nonzero) digits is 14112, while the sum is 33.

The square root of 206307087 is about 14363.3939930645. The cubic root of 206307087 is about 590.8873815205.

The spelling of 206307087 in words is "two hundred six million, three hundred seven thousand, eighty-seven".