91485487 has 2 divisors, whose sum is σ = 91485488. Its totient is φ = 91485486.

The previous prime is 91485481. The next prime is 91485521. The reversal of 91485487 is 78458419.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 91485487 - 2³ = 91485479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91485481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45742743 + 45742744.

It is an arithmetic number, because the mean of its divisors is an integer number (45742744).

Almost surely, 2^91485487 is an apocalyptic number.

91485487 is a deficient number, since it is larger than the sum of its proper divisors (1).

91485487 is an equidigital number, since it uses as much as digits as its factorization.

91485487 is an evil number, because the sum of its binary digits is even.

The product of its digits is 322560, while the sum is 46.

The square root of 91485487 is about 9564.8045981086. The cubic root of 91485487 is about 450.5926134723.

The spelling of 91485487 in words is "ninety-one million, four hundred eighty-five thousand, four hundred eighty-seven".