853643 has 4 divisors (see below), whose sum is σ = 975600. Its totient is φ = 731688.

The previous prime is 853637. The next prime is 853663. The reversal of 853643 is 346358.

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 853643 - 2⁸ = 853387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (853663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60968 + ... + 60981.

It is an arithmetic number, because the mean of its divisors is an integer number (243900).

2⁸⁵³⁶⁴³ is an apocalyptic number.

853643 is a deficient number, since it is larger than the sum of its proper divisors (121957).

853643 is a wasteful number, since it uses less digits than its factorization.

853643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121956.

The product of its digits is 8640, while the sum is 29.

The square root of 853643 is about 923.9280275000. The cubic root of 853643 is about 94.8619601831.

The spelling of 853643 in words is "eight hundred fifty-three thousand, six hundred forty-three".