866471 has 2 divisors, whose sum is σ = 866472. Its totient is φ = 866470.

The previous prime is 866461. The next prime is 866477. The reversal of 866471 is 174668.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-866471 is a prime.

It is a super-3 number, since 3×866471³ = 1951566480826215333, which contains 333 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (866477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433235 + 433236.

It is an arithmetic number, because the mean of its divisors is an integer number (433236).

2⁸⁶⁶⁴⁷¹ is an apocalyptic number.

866471 is a deficient number, since it is larger than the sum of its proper divisors (1).

866471 is an equidigital number, since it uses as much as digits as its factorization.

866471 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8064, while the sum is 32.

The square root of 866471 is about 930.8442404613. The cubic root of 866471 is about 95.3347745665.

The spelling of 866471 in words is "eight hundred sixty-six thousand, four hundred seventy-one".