91130565 has 8 divisors (see below), whose sum is σ = 145808928. Its totient is φ = 48602960.

The previous prime is 91130563. The next prime is 91130569. The reversal of 91130565 is 56503119.

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

It is not a de Polignac number, because 91130565 - 2¹ = 91130563 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91130561) 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, 3037671 + ... + 3037700.

It is an arithmetic number, because the mean of its divisors is an integer number (18226116).

Almost surely, 2^91130565 is an apocalyptic number.

It is an amenable number.

91130565 is a deficient number, since it is larger than the sum of its proper divisors (54678363).

91130565 is a wasteful number, since it uses less digits than its factorization.

91130565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6075379.

The product of its (nonzero) digits is 4050, while the sum is 30.

The square root of 91130565 is about 9546.2330266970. The cubic root of 91130565 is about 450.0091603074.

The spelling of 91130565 in words is "ninety-one million, one hundred thirty thousand, five hundred sixty-five".