91584005 has 8 divisors (see below), whose sum is σ = 111034392. Its totient is φ = 72511488.

The previous prime is 91583983. The next prime is 91584007. The reversal of 91584005 is 50048519.

It can be written as a sum of positive squares in 4 ways, for example, as 27552001 + 64032004 = 5249^2 + 8002^2 .

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-91584005 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 (91584007) 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, 93932 + ... + 94901.

It is an arithmetic number, because the mean of its divisors is an integer number (13879299).

Almost surely, 2^91584005 is an apocalyptic number.

It is an amenable number.

91584005 is a deficient number, since it is larger than the sum of its proper divisors (19450387).

91584005 is a wasteful number, since it uses less digits than its factorization.

91584005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188935.

The product of its (nonzero) digits is 7200, while the sum is 32.

The square root of 91584005 is about 9569.9532391752. The cubic root of 91584005 is about 450.7542987095.

The spelling of 91584005 in words is "ninety-one million, five hundred eighty-four thousand, five".