4509000091 has 2 divisors, whose sum is σ = 4509000092. Its totient is φ = 4509000090.

The previous prime is 4509000077. The next prime is 4509000121. The reversal of 4509000091 is 1900009054.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4509000091 - 2⁵ = 4509000059 is a prime.

It is not a weakly prime, because it can be changed into another prime (4509000061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2254500045 + 2254500046.

It is an arithmetic number, because the mean of its divisors is an integer number (2254500046).

Almost surely, 2^4509000091 is an apocalyptic number.

4509000091 is a deficient number, since it is larger than the sum of its proper divisors (1).

4509000091 is an equidigital number, since it uses as much as digits as its factorization.

4509000091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 4509000091 is about 67149.0885343949. The cubic root of 4509000091 is about 1652.0635450301.

The spelling of 4509000091 in words is "four billion, five hundred nine million, ninety-one", and thus it is an aban number.