9031681 has 2 divisors, whose sum is σ = 9031682. Its totient is φ = 9031680.

The previous prime is 9031657. The next prime is 9031699. The reversal of 9031681 is 1861309.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8071281 + 960400 = 2841^2 + 980^2 .

It is an emirp because it is prime and its reverse (1861309) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9031681 - 2¹³ = 9023489 is a prime.

It is a super-2 number, since 2×9031681² = 163142523371522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (9031181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4515840 + 4515841.

It is an arithmetic number, because the mean of its divisors is an integer number (4515841).

It is a Proth number, since it is equal to 2205 ⋅ 2¹² + 1 and 2205 < 2¹².

Almost surely, 2^9031681 is an apocalyptic number.

It is an amenable number.

9031681 is a deficient number, since it is larger than the sum of its proper divisors (1).

9031681 is an equidigital number, since it uses as much as digits as its factorization.

9031681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 9031681 is about 3005.2755281338. The cubic root of 9031681 is about 208.2521673510.

The spelling of 9031681 in words is "nine million, thirty-one thousand, six hundred eighty-one".