91825065 has 12 divisors (see below), whose sum is σ = 159163524. Its totient is φ = 48973344.

The previous prime is 91825057. The next prime is 91825079. The reversal of 91825065 is 56052819.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 65415744 + 26409321 = 8088^2 + 5139^2 .

It is not a de Polignac number, because 91825065 - 2³ = 91825057 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1020234 + ... + 1020323.

It is an arithmetic number, because the mean of its divisors is an integer number (13263627).

Almost surely, 2^91825065 is an apocalyptic number.

It is an amenable number.

91825065 is a deficient number, since it is larger than the sum of its proper divisors (67338459).

91825065 is a wasteful number, since it uses less digits than its factorization.

91825065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2040568 (or 2040565 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The square root of 91825065 is about 9582.5395903174. The cubic root of 91825065 is about 451.1494318847.

The spelling of 91825065 in words is "ninety-one million, eight hundred twenty-five thousand, sixty-five".