873643 has 2 divisors, whose sum is σ = 873644. Its totient is φ = 873642.

The previous prime is 873641. The next prime is 873659. The reversal of 873643 is 346378.

It is a weak prime.

873643 is a truncatable prime.

It is a cyclic number.

It is not a de Polignac number, because 873643 - 2¹ = 873641 is a prime.

Together with 873641, it forms a pair of twin primes.

It is a d-powerful number, because it can be written as 8³ + 7⁷ + 6⁶ + 3⁶ + 4² + 3⁷ .

It is a plaindrome in base 15.

It is not a weakly prime, because it can be changed into another prime (873641) 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, 436821 + 436822.

It is an arithmetic number, because the mean of its divisors is an integer number (436822).

2⁸⁷³⁶⁴³ is an apocalyptic number.

873643 is a deficient number, since it is larger than the sum of its proper divisors (1).

873643 is an equidigital number, since it uses as much as digits as its factorization.

873643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12096, while the sum is 31.

The square root of 873643 is about 934.6887182373. The cubic root of 873643 is about 95.5970888395.

The spelling of 873643 in words is "eight hundred seventy-three thousand, six hundred forty-three".