243667481 has 2 divisors, whose sum is σ = 243667482. Its totient is φ = 243667480.

The previous prime is 243667453. The next prime is 243667517. The reversal of 243667481 is 184766342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 203775625 + 39891856 = 14275^2 + 6316^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243667481 is a prime.

It is a super-2 number, since 2×243667481² = 118747682593770722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (243667421) 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, 121833740 + 121833741.

It is an arithmetic number, because the mean of its divisors is an integer number (121833741).

Almost surely, 2^243667481 is an apocalyptic number.

It is an amenable number.

243667481 is a deficient number, since it is larger than the sum of its proper divisors (1).

243667481 is an equidigital number, since it uses as much as digits as its factorization.

243667481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 193536, while the sum is 41.

The square root of 243667481 is about 15609.8520492668. The cubic root of 243667481 is about 624.5959893502.

The spelling of 243667481 in words is "two hundred forty-three million, six hundred sixty-seven thousand, four hundred eighty-one".