91748 has 6 divisors (see below), whose sum is σ = 160566. Its totient is φ = 45872.

The previous prime is 91733. The next prime is 91753. The reversal of 91748 is 84719.

It can be written as a sum of positive squares in only one way, i.e., 68644 + 23104 = 262^2 + 152^2 .

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 91748.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 91748.

It is an unprimeable number.

91748 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11465 + ... + 11472.

It is an arithmetic number, because the mean of its divisors is an integer number (26761).

2⁹¹⁷⁴⁸ is an apocalyptic number.

It is an amenable number.

91748 is a deficient number, since it is larger than the sum of its proper divisors (68818).

91748 is a wasteful number, since it uses less digits than its factorization.

91748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22941 (or 22939 counting only the distinct ones).

The product of its digits is 2016, while the sum is 29.

The square root of 91748 is about 302.8993232082. The cubic root of 91748 is about 45.1023186173.

Subtracting from 91748 its sum of digits (29), we obtain a palindrome (91719).

The spelling of 91748 in words is "ninety-one thousand, seven hundred forty-eight".