91024 has 10 divisors (see below), whose sum is σ = 176390. Its totient is φ = 45504.

The previous prime is 91019. The next prime is 91033. The reversal of 91024 is 42019.

It can be written as a sum of positive squares in only one way, i.e., 90000 + 1024 = 300^2 + 32^2 .

It is a Harshad number since it is a multiple of its sum of digits (16), and also a Moran number because the ratio is a prime number: 5689 = 91024 / (9 + 1 + 0 + 2 + 4).

It is a junction number, because it is equal to n+sod(n) for n = 90989 and 91007.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2829 + ... + 2860.

It is an arithmetic number, because the mean of its divisors is an integer number (17639).

2⁹¹⁰²⁴ is an apocalyptic number.

It is an amenable number.

91024 is a deficient number, since it is larger than the sum of its proper divisors (85366).

91024 is a wasteful number, since it uses less digits than its factorization.

91024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5697 (or 5691 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 91024 is about 301.7018395701. The cubic root of 91024 is about 44.9833683394.

It can be divided in two parts, 9 and 1024, that multiplied together give a square (9216 = 96²).

The spelling of 91024 in words is "ninety-one thousand, twenty-four".