91873 has 2 divisors, whose sum is σ = 91874. Its totient is φ = 91872.

The previous prime is 91867. The next prime is 91909. The reversal of 91873 is 37819.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 91809 + 64 = 303^2 + 8^2 .

It is a cyclic number.

It is not a de Polignac number, because 91873 - 2⁵ = 91841 is a prime.

It is not a weakly prime, because it can be changed into another prime (91813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45936 + 45937.

It is an arithmetic number, because the mean of its divisors is an integer number (45937).

2⁹¹⁸⁷³ is an apocalyptic number.

It is an amenable number.

91873 is a deficient number, since it is larger than the sum of its proper divisors (1).

91873 is an equidigital number, since it uses as much as digits as its factorization.

91873 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1512, while the sum is 28.

The square root of 91873 is about 303.1055921622. The cubic root of 91873 is about 45.1227922023.

The spelling of 91873 in words is "ninety-one thousand, eight hundred seventy-three".