9089000891 has 2 divisors, whose sum is σ = 9089000892. Its totient is φ = 9089000890.

The previous prime is 9089000749. The next prime is 9089000897. The reversal of 9089000891 is 1980009809.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9089000891 is a prime.

It is not a weakly prime, because it can be changed into another prime (9089000897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4544500445 + 4544500446.

It is an arithmetic number, because the mean of its divisors is an integer number (4544500446).

Almost surely, 2^9089000891 is an apocalyptic number.

9089000891 is a deficient number, since it is larger than the sum of its proper divisors (1).

9089000891 is an equidigital number, since it uses as much as digits as its factorization.

9089000891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46656, while the sum is 44.

The square root of 9089000891 is about 95336.2517146547. The cubic root of 9089000891 is about 2086.9179859078.

It can be divided in two parts, 90890008 and 91, that multiplied together give a palindrome (8270990728).

The spelling of 9089000891 in words is "nine billion, eighty-nine million, eight hundred ninety-one", and thus it is an aban number.