842663 has 4 divisors (see below), whose sum is σ = 860640. Its totient is φ = 824688.

The previous prime is 842657. The next prime is 842701. The reversal of 842663 is 366248.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 842663 - 2⁶ = 842599 is a prime.

It is a Duffinian number.

It is a plaindrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (842623) 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 3 ways as a sum of consecutive naturals, for example, 8918 + ... + 9011.

It is an arithmetic number, because the mean of its divisors is an integer number (215160).

2⁸⁴²⁶⁶³ is an apocalyptic number.

842663 is a deficient number, since it is larger than the sum of its proper divisors (17977).

842663 is a wasteful number, since it uses less digits than its factorization.

842663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17976.

The product of its digits is 6912, while the sum is 29.

The square root of 842663 is about 917.9667749979. The cubic root of 842663 is about 94.4534825132.

The spelling of 842663 in words is "eight hundred forty-two thousand, six hundred sixty-three".