243148837 has 2 divisors, whose sum is σ = 243148838. Its totient is φ = 243148836.

The previous prime is 243148823. The next prime is 243148849. The reversal of 243148837 is 738841342.

243148837 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 219810276 + 23338561 = 14826^2 + 4831^2 .

It is a cyclic number.

It is not a de Polignac number, because 243148837 - 2¹¹ = 243146789 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 243148837.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243148337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121574418 + 121574419.

It is an arithmetic number, because the mean of its divisors is an integer number (121574419).

Almost surely, 2^243148837 is an apocalyptic number.

It is an amenable number.

243148837 is a deficient number, since it is larger than the sum of its proper divisors (1).

243148837 is an equidigital number, since it uses as much as digits as its factorization.

243148837 is an evil number, because the sum of its binary digits is even.

The product of its digits is 129024, while the sum is 40.

The square root of 243148837 is about 15593.2304863360. The cubic root of 243148837 is about 624.1525256189.

The spelling of 243148837 in words is "two hundred forty-three million, one hundred forty-eight thousand, eight hundred thirty-seven".