243982853 has 2 divisors, whose sum is σ = 243982854. Its totient is φ = 243982852.

The previous prime is 243982831. The next prime is 243982891. The reversal of 243982853 is 358289342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 178970884 + 65011969 = 13378^2 + 8063^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243982853 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243982813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121991426 + 121991427.

It is an arithmetic number, because the mean of its divisors is an integer number (121991427).

Almost surely, 2^243982853 is an apocalyptic number.

It is an amenable number.

243982853 is a deficient number, since it is larger than the sum of its proper divisors (1).

243982853 is an equidigital number, since it uses as much as digits as its factorization.

243982853 is an evil number, because the sum of its binary digits is even.

The product of its digits is 414720, while the sum is 44.

The square root of 243982853 is about 15619.9504800752. The cubic root of 243982853 is about 624.8653388816.

The spelling of 243982853 in words is "two hundred forty-three million, nine hundred eighty-two thousand, eight hundred fifty-three".