91147705 has 8 divisors (see below), whose sum is σ = 119320704. Its totient is φ = 66289200.

The previous prime is 91147703. The next prime is 91147709. The reversal of 91147705 is 50774119.

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

It is not a de Polignac number, because 91147705 - 2¹ = 91147703 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91147703) 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, 828561 + ... + 828670.

It is an arithmetic number, because the mean of its divisors is an integer number (14915088).

Almost surely, 2^91147705 is an apocalyptic number.

It is an amenable number.

91147705 is a deficient number, since it is larger than the sum of its proper divisors (28172999).

91147705 is a wasteful number, since it uses less digits than its factorization.

91147705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1657247.

The product of its (nonzero) digits is 8820, while the sum is 34.

The square root of 91147705 is about 9547.1307207977. The cubic root of 91147705 is about 450.0373713819.

The spelling of 91147705 in words is "ninety-one million, one hundred forty-seven thousand, seven hundred five".