243287461 has 2 divisors, whose sum is σ = 243287462. Its totient is φ = 243287460.

The previous prime is 243287441. The next prime is 243287483. The reversal of 243287461 is 164782342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 219958561 + 23328900 = 14831^2 + 4830^2 .

It is a cyclic number.

It is not a de Polignac number, because 243287461 - 2¹³ = 243279269 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 243287461.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243287441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121643730 + 121643731.

It is an arithmetic number, because the mean of its divisors is an integer number (121643731).

Almost surely, 2^243287461 is an apocalyptic number.

It is an amenable number.

243287461 is a deficient number, since it is larger than the sum of its proper divisors (1).

243287461 is an equidigital number, since it uses as much as digits as its factorization.

243287461 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64512, while the sum is 37.

The square root of 243287461 is about 15597.6748587730. The cubic root of 243287461 is about 624.2711170178.

The spelling of 243287461 in words is "two hundred forty-three million, two hundred eighty-seven thousand, four hundred sixty-one".