243148447 has 2 divisors, whose sum is σ = 243148448. Its totient is φ = 243148446.

The previous prime is 243148439. The next prime is 243148463. The reversal of 243148447 is 744841342.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 243148447 - 2³ = 243148439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243148247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121574223 + 121574224.

It is an arithmetic number, because the mean of its divisors is an integer number (121574224).

Almost surely, 2^243148447 is an apocalyptic number.

243148447 is a deficient number, since it is larger than the sum of its proper divisors (1).

243148447 is an equidigital number, since it uses as much as digits as its factorization.

243148447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 86016, while the sum is 37.

The square root of 243148447 is about 15593.2179809044. The cubic root of 243148447 is about 624.1521919143.

Adding to 243148447 its reverse (744841342), we get a palindrome (987989789).

It can be divided in two parts, 24314844 and 7, that added together give a triangular number (24314851 = T₆₉₇₃).

The spelling of 243148447 in words is "two hundred forty-three million, one hundred forty-eight thousand, four hundred forty-seven".