91141873 has 4 divisors (see below), whose sum is σ = 91164580. Its totient is φ = 91119168.

The previous prime is 91141859. The next prime is 91141877. The reversal of 91141873 is 37814119.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 41692849 + 49449024 = 6457^2 + 7032^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91141873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91141877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3540 + ... + 13957.

It is an arithmetic number, because the mean of its divisors is an integer number (22791145).

Almost surely, 2^91141873 is an apocalyptic number.

It is an amenable number.

91141873 is a deficient number, since it is larger than the sum of its proper divisors (22707).

91141873 is a wasteful number, since it uses less digits than its factorization.

91141873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22706.

The product of its digits is 6048, while the sum is 34.

The square root of 91141873 is about 9546.8252838313. The cubic root of 91141873 is about 450.0277727715.

The spelling of 91141873 in words is "ninety-one million, one hundred forty-one thousand, eight hundred seventy-three".