863671 has 2 divisors, whose sum is σ = 863672. Its totient is φ = 863670.

The previous prime is 863641. The next prime is 863689. The reversal of 863671 is 176368.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-863671 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (863641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 431835 + 431836.

It is an arithmetic number, because the mean of its divisors is an integer number (431836).

2⁸⁶³⁶⁷¹ is an apocalyptic number.

863671 is a deficient number, since it is larger than the sum of its proper divisors (1).

863671 is an equidigital number, since it uses as much as digits as its factorization.

863671 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6048, while the sum is 31.

The square root of 863671 is about 929.3390124169. The cubic root of 863671 is about 95.2319723484.

It can be divided in two parts, 86367 and 1, that added together give a palindrome (86368).

The spelling of 863671 in words is "eight hundred sixty-three thousand, six hundred seventy-one".