243330013 has 2 divisors, whose sum is σ = 243330014. Its totient is φ = 243330012.

The previous prime is 243329987. The next prime is 243330023. The reversal of 243330013 is 310033342.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 174821284 + 68508729 = 13222^2 + 8277^2 .

It is a cyclic number.

It is not a de Polignac number, because 243330013 - 2²¹ = 241232861 is a prime.

It is equal to p_13334023 and since 243330013 and 13334023 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243330023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121665006 + 121665007.

It is an arithmetic number, because the mean of its divisors is an integer number (121665007).

Almost surely, 2^243330013 is an apocalyptic number.

It is an amenable number.

243330013 is a deficient number, since it is larger than the sum of its proper divisors (1).

243330013 is an equidigital number, since it uses as much as digits as its factorization.

243330013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 19.

The square root of 243330013 is about 15599.0388485958. The cubic root of 243330013 is about 624.3075107773.

Adding to 243330013 its reverse (310033342), we get a palindrome (553363355).

The spelling of 243330013 in words is "two hundred forty-three million, three hundred thirty thousand, thirteen".