91135087 has 8 divisors (see below), whose sum is σ = 93527280. Its totient is φ = 88751040.

The previous prime is 91135061. The next prime is 91135091. The reversal of 91135087 is 78053119.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91135087 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91135007) 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 7 ways as a sum of consecutive naturals, for example, 25333 + ... + 28705.

It is an arithmetic number, because the mean of its divisors is an integer number (11690910).

Almost surely, 2^91135087 is an apocalyptic number.

91135087 is a deficient number, since it is larger than the sum of its proper divisors (2392193).

91135087 is a wasteful number, since it uses less digits than its factorization.

91135087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4073.

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

The square root of 91135087 is about 9546.4698711094. The cubic root of 91135087 is about 450.0166035026.

The spelling of 91135087 in words is "ninety-one million, one hundred thirty-five thousand, eighty-seven".