91461986 has 32 divisors (see below), whose sum is σ = 172084608. Its totient is φ = 35418240.

The previous prime is 91461899. The next prime is 91462061. The reversal of 91461986 is 68916419.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24926 + ... + 28358.

It is an arithmetic number, because the mean of its divisors is an integer number (5377644).

Almost surely, 2^91461986 is an apocalyptic number.

91461986 is a deficient number, since it is larger than the sum of its proper divisors (80622622).

91461986 is a wasteful number, since it uses less digits than its factorization.

91461986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3626.

The product of its digits is 93312, while the sum is 44.

The square root of 91461986 is about 9563.5760048216. The cubic root of 91461986 is about 450.5540270829.

The spelling of 91461986 in words is "ninety-one million, four hundred sixty-one thousand, nine hundred eighty-six".