866802143 has 2 divisors, whose sum is σ = 866802144. Its totient is φ = 866802142.

The previous prime is 866802109. The next prime is 866802161. The reversal of 866802143 is 341208668.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 866802143 - 2¹² = 866798047 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 866802097 and 866802106.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (866802043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433401071 + 433401072.

It is an arithmetic number, because the mean of its divisors is an integer number (433401072).

Almost surely, 2^866802143 is an apocalyptic number.

866802143 is a deficient number, since it is larger than the sum of its proper divisors (1).

866802143 is an equidigital number, since it uses as much as digits as its factorization.

866802143 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 55296, while the sum is 38.

The square root of 866802143 is about 29441.5037489596. The cubic root of 866802143 is about 953.4691785515.

The spelling of 866802143 in words is "eight hundred sixty-six million, eight hundred two thousand, one hundred forty-three".