243036137 has 2 divisors, whose sum is σ = 243036138. Its totient is φ = 243036136.

The previous prime is 243036089. The next prime is 243036149. The reversal of 243036137 is 731630342.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 224880016 + 18156121 = 14996^2 + 4261^2 .

It is a cyclic number.

It is not a de Polignac number, because 243036137 - 2¹⁴ = 243019753 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (243032137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121518068 + 121518069.

It is an arithmetic number, because the mean of its divisors is an integer number (121518069).

Almost surely, 2^243036137 is an apocalyptic number.

It is an amenable number.

243036137 is a deficient number, since it is larger than the sum of its proper divisors (1).

243036137 is an equidigital number, since it uses as much as digits as its factorization.

243036137 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 29.

The square root of 243036137 is about 15589.6163198457. The cubic root of 243036137 is about 624.0560787112.

Adding to 243036137 its reverse (731630342), we get a palindrome (974666479).

The spelling of 243036137 in words is "two hundred forty-three million, thirty-six thousand, one hundred thirty-seven".