866087 has 2 divisors, whose sum is σ = 866088. Its totient is φ = 866086.

The previous prime is 866083. The next prime is 866093. The reversal of 866087 is 780668.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 866087 - 2² = 866083 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (866081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433043 + 433044.

It is an arithmetic number, because the mean of its divisors is an integer number (433044).

2⁸⁶⁶⁰⁸⁷ is an apocalyptic number.

866087 is a deficient number, since it is larger than the sum of its proper divisors (1).

866087 is an equidigital number, since it uses as much as digits as its factorization.

866087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 866087 is about 930.6379532342. The cubic root of 866087 is about 95.3206890930.

The spelling of 866087 in words is "eight hundred sixty-six thousand, eighty-seven".