91501 has 4 divisors (see below), whose sum is σ = 94012. Its totient is φ = 88992.

The previous prime is 91499. The next prime is 91513. The reversal of 91501 is 10519.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10519 = 67 ⋅157.

It can be written as a sum of positive squares in 2 ways, for example, as 75625 + 15876 = 275^2 + 126^2 .

It is a cyclic number.

It is not a de Polignac number, because 91501 - 2¹ = 91499 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91541) 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, 1200 + ... + 1273.

It is an arithmetic number, because the mean of its divisors is an integer number (23503).

2⁹¹⁵⁰¹ is an apocalyptic number.

It is an amenable number.

91501 is a deficient number, since it is larger than the sum of its proper divisors (2511).

91501 is a wasteful number, since it uses less digits than its factorization.

91501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2510.

The product of its (nonzero) digits is 45, while the sum is 16.

The square root of 91501 is about 302.4913221896. The cubic root of 91501 is about 45.0618080711.

The spelling of 91501 in words is "ninety-one thousand, five hundred one".