243488961 has 12 divisors (see below), whose sum is σ = 353218788. Its totient is φ = 161627904.

The previous prime is 243488951. The next prime is 243488989. The reversal of 243488961 is 169884342.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 78854400 + 164634561 = 8880^2 + 12831^2 .

It is not a de Polignac number, because 243488961 - 2¹⁴ = 243472577 is a prime.

It is not an unprimeable number, because it can be changed into a prime (243488951) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 55960 + ... + 60153.

It is an arithmetic number, because the mean of its divisors is an integer number (29434899).

Almost surely, 2^243488961 is an apocalyptic number.

It is an amenable number.

243488961 is a deficient number, since it is larger than the sum of its proper divisors (109729827).

243488961 is a wasteful number, since it uses less digits than its factorization.

243488961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116352 (or 116349 counting only the distinct ones).

The product of its digits is 331776, while the sum is 45.

The square root of 243488961 is about 15604.1328179428. The cubic root of 243488961 is about 624.4434178799.

The spelling of 243488961 in words is "two hundred forty-three million, four hundred eighty-eight thousand, nine hundred sixty-one".