10000891 has 2 divisors, whose sum is σ = 10000892. Its totient is φ = 10000890.

The previous prime is 10000877. The next prime is 10000931. The reversal of 10000891 is 19800001.

10000891 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 10000891 - 2⁷ = 10000763 is a prime.

It is not a weakly prime, because it can be changed into another prime (10000831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5000445 + 5000446.

It is an arithmetic number, because the mean of its divisors is an integer number (5000446).

Almost surely, 2^10000891 is an apocalyptic number.

10000891 is a deficient number, since it is larger than the sum of its proper divisors (1).

10000891 is an equidigital number, since it uses as much as digits as its factorization.

10000891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 19.

The square root of 10000891 is about 3162.4185365002. The cubic root of 10000891 is about 215.4498674842.

Adding to 10000891 its reverse (19800001), we get a palindrome (29800892).

The spelling of 10000891 in words is "ten million, eight hundred ninety-one", and thus it is an aban number.