243636137 has 2 divisors, whose sum is σ = 243636138. Its totient is φ = 243636136.

The previous prime is 243636131. The next prime is 243636143. The reversal of 243636137 is 731636342.

It is a balanced prime because it is at equal distance from previous prime (243636131) and next prime (243636143).

It can be written as a sum of positive squares in only one way, i.e., 243484816 + 151321 = 15604^2 + 389^2 .

It is a cyclic number.

It is not a de Polignac number, because 243636137 - 2¹⁶ = 243570601 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 243636097 and 243636106.

It is not a weakly prime, because it can be changed into another prime (243636131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121818068 + 121818069.

It is an arithmetic number, because the mean of its divisors is an integer number (121818069).

Almost surely, 2^243636137 is an apocalyptic number.

It is an amenable number.

243636137 is a deficient number, since it is larger than the sum of its proper divisors (1).

243636137 is an equidigital number, since it uses as much as digits as its factorization.

243636137 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 35.

The square root of 243636137 is about 15608.8480356495. The cubic root of 243636137 is about 624.5692067090.

The spelling of 243636137 in words is "two hundred forty-three million, six hundred thirty-six thousand, one hundred thirty-seven".