206929087 has 2 divisors, whose sum is σ = 206929088. Its totient is φ = 206929086.

The previous prime is 206929081. The next prime is 206929097. The reversal of 206929087 is 780929602.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-206929087 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206929081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103464543 + 103464544.

It is an arithmetic number, because the mean of its divisors is an integer number (103464544).

Almost surely, 2^206929087 is an apocalyptic number.

206929087 is a deficient number, since it is larger than the sum of its proper divisors (1).

206929087 is an equidigital number, since it uses as much as digits as its factorization.

206929087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 206929087 is about 14385.0299617345. The cubic root of 206929087 is about 591.4806124073.

The spelling of 206929087 in words is "two hundred six million, nine hundred twenty-nine thousand, eighty-seven".