91027 has 4 divisors (see below), whose sum is σ = 91656. Its totient is φ = 90400.

The previous prime is 91019. The next prime is 91033. The reversal of 91027 is 72019.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 91027 - 2³ = 91019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 90995 and 91013.

It is not an unprimeable number, because it can be changed into a prime (91097) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27 + ... + 427.

It is an arithmetic number, because the mean of its divisors is an integer number (22914).

2⁹¹⁰²⁷ is an apocalyptic number.

91027 is a deficient number, since it is larger than the sum of its proper divisors (629).

91027 is a wasteful number, since it uses less digits than its factorization.

91027 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 628.

The product of its (nonzero) digits is 126, while the sum is 19.

The square root of 91027 is about 301.7068113252. The cubic root of 91027 is about 44.9838625264.

The spelling of 91027 in words is "ninety-one thousand, twenty-seven".