91541 has 2 divisors, whose sum is σ = 91542. Its totient is φ = 91540.

The previous prime is 91529. The next prime is 91571. The reversal of 91541 is 14519.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70225 + 21316 = 265^2 + 146^2 .

It is an emirp because it is prime and its reverse (14519) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91541 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45770 + 45771.

It is an arithmetic number, because the mean of its divisors is an integer number (45771).

2⁹¹⁵⁴¹ is an apocalyptic number.

It is an amenable number.

91541 is a deficient number, since it is larger than the sum of its proper divisors (1).

91541 is an equidigital number, since it uses as much as digits as its factorization.

91541 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 180, while the sum is 20.

The square root of 91541 is about 302.5574325645. The cubic root of 91541 is about 45.0683734264.

The spelling of 91541 in words is "ninety-one thousand, five hundred forty-one".