853240243 has 4 divisors (see below), whose sum is σ = 865975240. Its totient is φ = 840505248.

The previous prime is 853240237. The next prime is 853240253. The reversal of 853240243 is 342042358.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-853240243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (853240253) 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, 6367398 + ... + 6367531.

It is an arithmetic number, because the mean of its divisors is an integer number (216493810).

Almost surely, 2^853240243 is an apocalyptic number.

853240243 is a deficient number, since it is larger than the sum of its proper divisors (12734997).

853240243 is a wasteful number, since it uses less digits than its factorization.

853240243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12734996.

The product of its (nonzero) digits is 23040, while the sum is 31.

The square root of 853240243 is about 29210.2763252935. The cubic root of 853240243 is about 948.4703890698.

The spelling of 853240243 in words is "eight hundred fifty-three million, two hundred forty thousand, two hundred forty-three".