243436652449 has 3 divisors (see below), whose sum is σ = 243437145843. Its totient is φ = 243436159056.

The previous prime is 243436652383. The next prime is 243436652453. The reversal of 243436652449 is 944256634342.

The square root of 243436652449 is 493393.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 148799205025 + 94637447424 = 385745^2 + 307632^2 .

It is not a de Polignac number, because 243436652449 - 2²¹ = 243434555297 is a prime.

It is a super-2 number, since 2×243436652449² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 243436652396 and 243436652405.

It is not an unprimeable number, because it can be changed into a prime (243436652549) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 246697 + ... + 740089.

It is an arithmetic number, because the mean of its divisors is an integer number (81145715281).

Almost surely, 2^243436652449 is an apocalyptic number.

243436652449 is the 493393-rd square number.

243436652449 is the 246697-th centered octagonal number.

It is an amenable number.

243436652449 is a deficient number, since it is larger than the sum of its proper divisors (493394).

243436652449 is an frugal number, since it uses more digits than its factorization.

243436652449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 986786 (or 493393 counting only the distinct ones).

The product of its digits is 14929920, while the sum is 52.

The spelling of 243436652449 in words is "two hundred forty-three billion, four hundred thirty-six million, six hundred fifty-two thousand, four hundred forty-nine".