91488861 has 12 divisors (see below), whose sum is σ = 132376192. Its totient is φ = 60888456.

The previous prime is 91488853. The next prime is 91488863. The reversal of 91488861 is 16888419.

91488861 is a `hidden beast` number, since 91 + 488 + 86 + 1 = 666.

It is not a de Polignac number, because 91488861 - 2³ = 91488853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91488863) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2911 + ... + 13836.

Almost surely, 2^91488861 is an apocalyptic number.

It is an amenable number.

91488861 is a deficient number, since it is larger than the sum of its proper divisors (40887331).

91488861 is a wasteful number, since it uses less digits than its factorization.

91488861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17360 (or 17357 counting only the distinct ones).

The product of its digits is 110592, while the sum is 45.

The square root of 91488861 is about 9564.9809722759. The cubic root of 91488861 is about 450.5981527144.

The spelling of 91488861 in words is "ninety-one million, four hundred eighty-eight thousand, eight hundred sixty-one".