91875085 has 8 divisors (see below), whose sum is σ = 110380536. Its totient is φ = 73413120.

The previous prime is 91875079. The next prime is 91875109. The reversal of 91875085 is 58057819.

It can be written as a sum of positive squares in 4 ways, for example, as 18224361 + 73650724 = 4269^2 + 8582^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 91875085 - 2⁵ = 91875053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6024 + ... + 14833.

It is an arithmetic number, because the mean of its divisors is an integer number (13797567).

Almost surely, 2^91875085 is an apocalyptic number.

It is an amenable number.

91875085 is a deficient number, since it is larger than the sum of its proper divisors (18505451).

91875085 is a wasteful number, since it uses less digits than its factorization.

91875085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21743.

The product of its (nonzero) digits is 100800, while the sum is 43.

The square root of 91875085 is about 9585.1491902839. The cubic root of 91875085 is about 451.2313354414.

The spelling of 91875085 in words is "ninety-one million, eight hundred seventy-five thousand, eighty-five".