91481 has 8 divisors (see below), whose sum is σ = 102144. Its totient is φ = 81360.

The previous prime is 91463. The next prime is 91493. The reversal of 91481 is 18419.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91481 is a prime.

It is a super-2 number, since 2×91481² = 16737546722, which contains 22 as substring.

It is a Duffinian number.

91481 is a modest number, since divided by 481 gives 91 as remainder.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 91481.

It is not an unprimeable number, because it can be changed into a prime (91411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 290 + ... + 516.

It is an arithmetic number, because the mean of its divisors is an integer number (12768).

2⁹¹⁴⁸¹ is an apocalyptic number.

It is an amenable number.

91481 is a deficient number, since it is larger than the sum of its proper divisors (10663).

91481 is a wasteful number, since it uses less digits than its factorization.

91481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271.

The product of its digits is 288, while the sum is 23.

The square root of 91481 is about 302.4582615833. The cubic root of 91481 is about 45.0585246759.

The spelling of 91481 in words is "ninety-one thousand, four hundred eighty-one".