243064861 has 8 divisors (see below), whose sum is σ = 277160184. Its totient is φ = 211169280.

The previous prime is 243064841. The next prime is 243064907. The reversal of 243064861 is 168460342.

It can be written as a sum of positive squares in 4 ways, for example, as 8791225 + 234273636 = 2965^2 + 15306^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 243064861 - 2⁷ = 243064733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243064841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 549700 + ... + 550141.

It is an arithmetic number, because the mean of its divisors is an integer number (34645023).

Almost surely, 2^243064861 is an apocalyptic number.

It is an amenable number.

243064861 is a deficient number, since it is larger than the sum of its proper divisors (34095323).

243064861 is a wasteful number, since it uses less digits than its factorization.

243064861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1099871.

The product of its (nonzero) digits is 27648, while the sum is 34.

The square root of 243064861 is about 15590.5375468584. The cubic root of 243064861 is about 624.0806630945.

The spelling of 243064861 in words is "two hundred forty-three million, sixty-four thousand, eight hundred sixty-one".