9040861 has 2 divisors, whose sum is σ = 9040862. Its totient is φ = 9040860.

The previous prime is 9040859. The next prime is 9040877. The reversal of 9040861 is 1680409.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8820900 + 219961 = 2970^2 + 469^2 .

It is a cyclic number.

It is not a de Polignac number, because 9040861 - 2¹ = 9040859 is a prime.

Together with 9040859, it forms a pair of twin primes.

It is equal to p₆₀₄₉₈₁ and since 9040861 and 604981 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9040891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4520430 + 4520431.

It is an arithmetic number, because the mean of its divisors is an integer number (4520431).

Almost surely, 2^9040861 is an apocalyptic number.

It is an amenable number.

9040861 is a deficient number, since it is larger than the sum of its proper divisors (1).

9040861 is an equidigital number, since it uses as much as digits as its factorization.

9040861 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 9040861 is about 3006.8024544356. The cubic root of 9040861 is about 208.3227008263.

The spelling of 9040861 in words is "nine million, forty thousand, eight hundred sixty-one".