8587420091 has 2 divisors, whose sum is σ = 8587420092. Its totient is φ = 8587420090.

The previous prime is 8587420073. The next prime is 8587420129. The reversal of 8587420091 is 1900247858.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8587420091 - 2¹⁸ = 8587157947 is a prime.

It is not a weakly prime, because it can be changed into another prime (8587420031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4293710045 + 4293710046.

It is an arithmetic number, because the mean of its divisors is an integer number (4293710046).

Almost surely, 2^8587420091 is an apocalyptic number.

8587420091 is a deficient number, since it is larger than the sum of its proper divisors (1).

8587420091 is an equidigital number, since it uses as much as digits as its factorization.

8587420091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 161280, while the sum is 44.

The square root of 8587420091 is about 92668.3338093440. Note that the first 3 decimals coincide. The cubic root of 8587420091 is about 2047.8001459127.

The spelling of 8587420091 in words is "eight billion, five hundred eighty-seven million, four hundred twenty thousand, ninety-one".