91371085 has 8 divisors (see below), whose sum is σ = 118079640. Its totient is φ = 67473984.

The previous prime is 91371061. The next prime is 91371089. The reversal of 91371085 is 58017319.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 988036 + 90383049 = 994^2 + 9507^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 91371085 - 2¹⁷ = 91240013 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 91371085.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91371089) 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, 702790 + ... + 702919.

It is an arithmetic number, because the mean of its divisors is an integer number (14759955).

Almost surely, 2^91371085 is an apocalyptic number.

It is an amenable number.

91371085 is a deficient number, since it is larger than the sum of its proper divisors (26708555).

91371085 is a wasteful number, since it uses less digits than its factorization.

91371085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1405727.

The product of its (nonzero) digits is 7560, while the sum is 34.

The square root of 91371085 is about 9558.8223647058. The cubic root of 91371085 is about 450.4047140946.

The spelling of 91371085 in words is "ninety-one million, three hundred seventy-one thousand, eighty-five".