243623104237 has 2 divisors, whose sum is σ = 243623104238. Its totient is φ = 243623104236.

The previous prime is 243623104199. The next prime is 243623104273. The reversal of 243623104237 is 732401326342.

Together with next prime (243623104273) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 170163675081 + 73459429156 = 412509^2 + 271034^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243623104237 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 243623104196 and 243623104205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243623104337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121811552118 + 121811552119.

It is an arithmetic number, because the mean of its divisors is an integer number (121811552119).

Almost surely, 2^243623104237 is an apocalyptic number.

It is an amenable number.

243623104237 is a deficient number, since it is larger than the sum of its proper divisors (1).

243623104237 is an equidigital number, since it uses as much as digits as its factorization.

243623104237 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152, while the sum is 37.

The spelling of 243623104237 in words is "two hundred forty-three billion, six hundred twenty-three million, one hundred four thousand, two hundred thirty-seven".