91004505 has 8 divisors (see below), whose sum is σ = 145607232. Its totient is φ = 48535728.

The previous prime is 91004503. The next prime is 91004513. The reversal of 91004505 is 50540019.

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

It is not a de Polignac number, because 91004505 - 2¹ = 91004503 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (91004503) 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, 3033469 + ... + 3033498.

It is an arithmetic number, because the mean of its divisors is an integer number (18200904).

Almost surely, 2^91004505 is an apocalyptic number.

It is an amenable number.

91004505 is a deficient number, since it is larger than the sum of its proper divisors (54602727).

91004505 is a wasteful number, since it uses less digits than its factorization.

91004505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6066975.

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 91004505 is about 9539.6281374066. The cubic root of 91004505 is about 449.8015668322.

The spelling of 91004505 in words is "ninety-one million, four thousand, five hundred five".