91045285 has 8 divisors (see below), whose sum is σ = 115681176. Its totient is φ = 68551680.

The previous prime is 91045277. The next prime is 91045289. The reversal of 91045285 is 58254019.

It can be written as a sum of positive squares in 4 ways, for example, as 10458756 + 80586529 = 3234^2 + 8977^2 .

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

It is not a de Polignac number, because 91045285 - 2³ = 91045277 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 91045285.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91045289) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 535476 + ... + 535645.

It is an arithmetic number, because the mean of its divisors is an integer number (14460147).

Almost surely, 2^91045285 is an apocalyptic number.

It is an amenable number.

91045285 is a deficient number, since it is larger than the sum of its proper divisors (24635891).

91045285 is a wasteful number, since it uses less digits than its factorization.

91045285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1071143.

The product of its (nonzero) digits is 14400, while the sum is 34.

The square root of 91045285 is about 9541.7652978891. The cubic root of 91045285 is about 449.8687436117.

The spelling of 91045285 in words is "ninety-one million, forty-five thousand, two hundred eighty-five".