91530641 has 8 divisors (see below), whose sum is σ = 95609280. Its totient is φ = 87513552.

The previous prime is 91530623. The next prime is 91530671. The reversal of 91530641 is 14603519.

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

It is a cyclic number.

It is not a de Polignac number, because 91530641 - 2⁶ = 91530577 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91530671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12335 + ... + 18308.

It is an arithmetic number, because the mean of its divisors is an integer number (11951160).

Almost surely, 2^91530641 is an apocalyptic number.

It is an amenable number.

91530641 is a deficient number, since it is larger than the sum of its proper divisors (4078639).

91530641 is a wasteful number, since it uses less digits than its factorization.

91530641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30775.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 91530641 is about 9567.1647315179. The cubic root of 91530641 is about 450.6667334706. Note that the first 3 decimals are identical.

The spelling of 91530641 in words is "ninety-one million, five hundred thirty thousand, six hundred forty-one".