867643 has 6 divisors (see below), whose sum is σ = 1009356. Its totient is φ = 743652.

The previous prime is 867641. The next prime is 867653. The reversal of 867643 is 346768.

It is not a de Polignac number, because 867643 - 2¹ = 867641 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 867599 and 867608.

It is not an unprimeable number, because it can be changed into a prime (867641) by changing a digit.

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

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8805 + ... + 8902.

It is an arithmetic number, because the mean of its divisors is an integer number (168226).

2⁸⁶⁷⁶⁴³ is an apocalyptic number.

867643 is a deficient number, since it is larger than the sum of its proper divisors (141713).

867643 is a wasteful number, since it uses less digits than its factorization.

867643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17721 (or 17714 counting only the distinct ones).

The product of its digits is 24192, while the sum is 34.

The square root of 867643 is about 931.4735637687. The cubic root of 867643 is about 95.3777388883.

The spelling of 867643 in words is "eight hundred sixty-seven thousand, six hundred forty-three".