9400861 has 2 divisors, whose sum is σ = 9400862. Its totient is φ = 9400860.

The previous prime is 9400841. The next prime is 9400871. The reversal of 9400861 is 1680049.

9400861 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9180900 + 219961 = 3030^2 + 469^2 .

It is a cyclic number.

It is not a de Polignac number, because 9400861 - 2⁷ = 9400733 is a prime.

It is equal to p₆₂₇₄₅₄ and since 9400861 and 627454 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 (9400841) 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, 4700430 + 4700431.

It is an arithmetic number, because the mean of its divisors is an integer number (4700431).

Almost surely, 2^9400861 is an apocalyptic number.

It is an amenable number.

9400861 is a deficient number, since it is larger than the sum of its proper divisors (1).

9400861 is an equidigital number, since it uses as much as digits as its factorization.

9400861 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 9400861 is about 3066.0823537537. The cubic root of 9400861 is about 211.0518728734.

The spelling of 9400861 in words is "nine million, four hundred thousand, eight hundred sixty-one".