91085270 has 32 divisors (see below), whose sum is σ = 169011360. Its totient is φ = 35326720.

The previous prime is 91085263. The next prime is 91085273. The reversal of 91085270 is 7258019.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91085273) 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 15 ways as a sum of consecutive naturals, for example, 46205 + ... + 48135.

It is an arithmetic number, because the mean of its divisors is an integer number (5281605).

Almost surely, 2^91085270 is an apocalyptic number.

91085270 is a deficient number, since it is larger than the sum of its proper divisors (77926090).

91085270 is a wasteful number, since it uses less digits than its factorization.

91085270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2080.

The product of its (nonzero) digits is 5040, while the sum is 32.

The square root of 91085270 is about 9543.8603300761. The cubic root of 91085270 is about 449.9345913162.

The spelling of 91085270 in words is "ninety-one million, eighty-five thousand, two hundred seventy".