91553 has 16 divisors (see below), whose sum is σ = 120960. Its totient is φ = 67200.

The previous prime is 91541. The next prime is 91571. The reversal of 91553 is 35519.

It is not a de Polignac number, because 91553 - 2⁸ = 91297 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91513) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2213 + ... + 2253.

It is an arithmetic number, because the mean of its divisors is an integer number (7560).

2⁹¹⁵⁵³ is an apocalyptic number.

It is an amenable number.

91553 is a deficient number, since it is larger than the sum of its proper divisors (29407).

91553 is a wasteful number, since it uses less digits than its factorization.

91553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88.

The product of its digits is 675, while the sum is 23.

The square root of 91553 is about 302.5772628602. The cubic root of 91553 is about 45.0703426601.

The spelling of 91553 in words is "ninety-one thousand, five hundred fifty-three".