9243781 has 2 divisors, whose sum is σ = 9243782. Its totient is φ = 9243780.

The previous prime is 9243761. The next prime is 9243791. The reversal of 9243781 is 1873429.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6890625 + 2353156 = 2625^2 + 1534^2 .

It is a cyclic number.

It is not a de Polignac number, because 9243781 - 2⁷ = 9243653 is a prime.

It is a super-2 number, since 2×9243781² = 170894974351922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9243761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4621890 + 4621891.

It is an arithmetic number, because the mean of its divisors is an integer number (4621891).

Almost surely, 2^9243781 is an apocalyptic number.

It is an amenable number.

9243781 is a deficient number, since it is larger than the sum of its proper divisors (1).

9243781 is an equidigital number, since it uses as much as digits as its factorization.

9243781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12096, while the sum is 34.

The square root of 9243781 is about 3040.3586959436. The cubic root of 9243781 is about 209.8697680815.

The spelling of 9243781 in words is "nine million, two hundred forty-three thousand, seven hundred eighty-one".