91485587 has 2 divisors, whose sum is σ = 91485588. Its totient is φ = 91485586.

The previous prime is 91485521. The next prime is 91485599. The reversal of 91485587 is 78558419.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91485587 - 2¹² = 91481491 is a prime.

It is a super-2 number, since 2×91485587² = 16739225257469138, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (91485187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45742793 + 45742794.

It is an arithmetic number, because the mean of its divisors is an integer number (45742794).

Almost surely, 2^91485587 is an apocalyptic number.

91485587 is a deficient number, since it is larger than the sum of its proper divisors (1).

91485587 is an equidigital number, since it uses as much as digits as its factorization.

91485587 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 403200, while the sum is 47.

The square root of 91485587 is about 9564.8098256055. The cubic root of 91485587 is about 450.5927776486.

The spelling of 91485587 in words is "ninety-one million, four hundred eighty-five thousand, five hundred eighty-seven".