9400681 has 2 divisors, whose sum is σ = 9400682. Its totient is φ = 9400680.

The previous prime is 9400673. The next prime is 9400693. The reversal of 9400681 is 1860049.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5480281 + 3920400 = 2341^2 + 1980^2 .

It is a cyclic number.

It is not a de Polignac number, because 9400681 - 2³ = 9400673 is a prime.

It is a super-2 number, since 2×9400681² = 176745606527522, which contains 22 as substring.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (9400381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4700340 + 4700341.

It is an arithmetic number, because the mean of its divisors is an integer number (4700341).

Almost surely, 2^9400681 is an apocalyptic number.

It is an amenable number.

9400681 is a deficient number, since it is larger than the sum of its proper divisors (1).

9400681 is an equidigital number, since it uses as much as digits as its factorization.

9400681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 9400681 is about 3066.0530001942. The cubic root of 9400681 is about 211.0505258485.

The spelling of 9400681 in words is "nine million, four hundred thousand, six hundred eighty-one".